Don’t lose your progress!

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Up to 90+ points GMAT score improvement guarantee

The best guarantee you’ll find

Our Premium and Ultimate plans guarantee up to 90+ points score increase or your money back.

Master each section of the test

Comprehensive GMAT prep

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Schedule-free studying

Learn on the go

Study whenever and wherever you want with our iOS and Android mobile apps.

The most effective way to study

Personalized GMAT prep, just for you!

Adaptive learning technology focuses on your academic weaknesses.

Reading Comprehension: Main Idea Questions

The author's primary purpose is to



The passage discusses two theories of the Moon's formation. Although a scientific theory is not undisputed fact, by discussing theories the author emphasizes what scientists do know, not the knowledge that they lack.



Although the author discusses two competing theories of the Moon's creation, he or she does not just compare the two but shows why one is better than the other.



The theory proposed by reputable scientists is criticized by the author, who calls it inherently flawed. Therefore the author does not applaud, or praise, these scientists.



Although the author criticizes the first theory of the Moon's creation, she or he supports the second one. Therefore, to the author, not all theories of the Moon's creation are flawed.



Lunar formation means "how the moon was formed". The passage deals with two possible theories of how the moon as created:

1) first sentence: created simultaneously with Earth from the primordial accretion disc. The passage then goes on to explain the problems with this theory, leading up to:

7th sentence:Nevertheless, another, more plausible theory has emerged which accounts for the Moon's formation. Dubbed the Giant Impact Hypothesis, it conjectures that the Moon was created as a result of a collision of the proto-Earth and another large planetary body roughly the size of Mars.

thus the answer is correct.

compare competing theories of the Moon's creation
applaud reputable astrophysicists for their theory on lunar formation
emphasize scientists' lack of knowledge regarding the Moon's formation
show why all theories of the Moon's creation are inherently flawed
promote a theory of lunar formation over a competing theory