BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
Vote for Target Test Prep, Newsweek Readers’ Choice Awards 2026
NEWSWEEK READERS’ CHOICE 2026

BIG NEWS! Target Test Prep has been nominated, and they’d love your vote!

TTP has worked incredibly hard to build the best test prep experience possible, and winning Newsweek’s 2026 Readers’ Choice Award for Best Test Prep would mean a lot to them. If TTP has helped you, they’d be incredibly grateful for your vote. You can vote once each day through September 9.

Vote for TTP
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
40 hours of live online classes plus six months of access to the complete TTP EA OnDemand course.
  • 165+ EA Score Guarantee
  • 4,100+ Quant, Verbal, and Integrated Reasoning practice questions
  • 400+ hours of in-depth video lessons
  • 3,000+ step-by-step video solutions
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

715+ score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

difference between interaction of" and "interactio

Expert replies
Post new topic Locked
Previous Topic Next Topic
Master | Next Rank: 500 Posts
Posts: 231
Joined: Thu Apr 12, 2007 2:45 amFollowed by: 1 member
Thanked: 5 times
by winnerhere » Sun Sep 30, 2007 10:29 am
whats the difference between "interaction between" and "interaction of"
It seems likely that a number of astronomical phenomena, such as the formation of planetary nebulas, may be caused by the interaction where two stars orbit each other at close range.

(A) may be caused by the interaction where two stars orbit each other

(B) may be caused by the interaction between two stars that each orbit the other

(C) are because of the interaction between two stars that orbit each other

(D) are caused by the interaction of two stars where each is orbiting the other

(E) are caused by the interaction of two stars orbiting each other
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Source: — Sentence Correction |
Senior | Next Rank: 100 Posts
Posts: 91
Joined: Wed May 16, 2007 5:46 am
Thanked: 2 times

by raulverde » Sun Sep 30, 2007 1:04 pm
I would go with

(E) are caused by the interaction of two stars orbiting each other

"It seems likely" and "May be" , have similar meaning.

C and D are awkwardly constructed.

OA please
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Master | Next Rank: 500 Posts
Posts: 231
Joined: Thu Apr 12, 2007 2:45 amFollowed by: 1 member
Thanked: 5 times

by winnerhere » Sun Sep 30, 2007 11:22 pm
OA is E

but whats with c?explanation please

e is correct :D
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 91
Joined: Wed May 16, 2007 5:46 am
Thanked: 2 times

by raulverde » Mon Oct 01, 2007 5:58 am
winnerhere,

The original sentence is trying to imply a Cause so we needs to reflect that in our answer. Interaction Causes the Phenomenon

HTH
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Senior | Next Rank: 100 Posts
Posts: 50
Joined: Mon Jul 02, 2007 4:18 pm

by jay2007 » Mon Oct 01, 2007 3:54 pm
IMO, the phrases should be used as follows:

interaction between - interaction between X and Y
interaction of - Interaction of X with Y

Answer is C:
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Community Manager
Posts: 117
Joined: Tue Feb 27, 2007 11:49 pm
Thanked: 9 times

by pahwa » Wed Oct 10, 2007 8:26 pm
If you guys are confused between C and E, here is my explaination for choosing E.

One of the principle in SC is "pick the sentence that is most economic with words." That is, if I can convey a message with 10 words, why should I choose 11?

Similar is the difference between C and E,
C. are because of the interaction between two stars that orbit each other
E. are caused by the interaction of two stars orbiting each other

Lets remove the common words
we are left with following
because of...is replaced by Caused by....fine, no change in number of words. Lets move on.

That orbit is replaced by one word orbitting.

Another thing to note here is phenomena are CAUSED by some thing...Things HAPPEN BECAUSE OF something. Phenomena can not happen...they are caused...

So, what I feel is catch in this question is not "interaction", catch is to find out concise sentence and usage of right grammer.
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Junior | Next Rank: 30 Posts
Posts: 11
Joined: Wed Aug 11, 2010 8:52 pm

by sharkin » Thu Aug 12, 2010 4:26 am
OG way of negating option C is::

"are" requires a verb form i.e. 'caused', rather than an adverb i.e. 'because'..

An expert's comment is sought here!
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Locked
• Page 1 of 1