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.

★★★★★5.0563 reviews
Newsweek Readers’ Choice Awards 2026 winner: Target Test Prep, #1 Test Prep
NEWSWEEK READERS’ CHOICE AWARDS 2026

Target Test Prep was voted #1 Best Test Prep in the 2026 Newsweek Readers’ Choice™ Awards.

GMATLiveTeach Starts Oct 17
Chris Peckover, Target Test Prep GMAT expert
LIVE ONLINE CLASSES

Get Ready for GMAT Test Day Faster with Live Online Classes

with Chris Peckover, 100th-Percentile GMAT Scorer

Oct 17 · Chris Peckover
Sat · 11:00 AM to 2:00 PM ET
Oct 20 · Chris Peckover
Tue, Thu · 8:00 to 10:00 PM ET
Oct 25 · Josh Braslow
Sun · 1:00 to 4:00 PM ET
Included
40 hours of live online classes + 6 months of TTP OnDemand
  • Attend the first class for free
  • Every class is recorded, so you never fall behind
View classes & enroll
Limited seats availableTarget Test Prep
EALiveTeachOnDemand 5 seats left Start anytime
EXECUTIVE ASSESSMENT

Target Test Prep EA OnDemand

Self-paced EA prep. Study on your schedule.

Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

165+ EA score guarantee
$05-day trial no automatic billing
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 Start free 5-day trial
Limited cohort · enrollment openTrial includes full course accessTarget 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

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

CR - Argument Weakner

Expert replies
by piyush1391 » Tue Aug 04, 2020 6:44 pm

Timer

00:00

Answers

A

B

C

D

E

Stats

Difficulty—

Q.1 Although Fullerenes - spherical molecules made entirely of carbon - were first
found in the laboratory, they have since been found in nature, formed in fissures
of the rare mineral Shungite. Since laboratory synthesis of Fullerenes requires
distinctive conditions of temperature and pressure, this discovery should give
geologists a test case for evaluating hypothesis about the state of the Earth's
crust at the time these naturally occurring Fullerenes were formed.
Which of the following, if true, most seriously undermines the
argument?

A) Confirming that the shungite genuinely contained fullerenes took careful
experimentation
B) Some fullerenes have also been found on the remains of a small meteorite
that collided with a spacecraft.
C) The mineral shungite itself contains large amounts of carbon, from which the
fullerenes apparently formed.
D) The naturally occurring fullerenes are arranged in a previously unknown
crystalline structure
E) Shungite itself is formed only under distinctive conditions.

What should be the answer of this question
I want to know the reasoning behind the correct answer also.
Join the discussion
Source: — Critical Reasoning |