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by anksm22 » Mon Nov 03, 2014 10:03 am
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
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by GMATGuruNY » Tue Nov 04, 2014 2:39 am
anksm22 wrote: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
In A and B, likely and may are redundant, since likely -- all on its own -- implies that something MAY be true.
Eliminate A and B.

C: A number of astronomical phenomena...are because of the interaction.
Conveyed meaning:
Because of the interaction, a number of astronomical phenomena are.
These phenomena are WHAT exactly?
The thought is incomplete.
Eliminate C.
Note the following:
is/are/were + because is ALWAYS WRONG.

D: two stars where each is orbiting the other
Here, where seems to refer to two stars.
Conveyed meaning:
WHERE is each star orbiting the other?
AT TWO STARS.
This meaning is nonsensical.
Eliminate D.

The correct answer is E.
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