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 of the passage is primarily concerned with

Incorrect.

[[snippet]]

This answer choice is too broad/general. The passage does not discuss the De Beers diamond cartel in general but uses it as an example of how advertising affects business success.

Incorrect.

[[snippet]]

This answer choice is too broad/general. The passage focuses on a particular example of advertising: the diamond business.

Incorrect.

[[snippet]]

This answer choice is too narrow/specific. The idea of diamonds as an expression of love is the topic of the second paragraph and not the entire passage.

Incorrect.

[[snippet]]

This answer choice is too narrow/specific. The scarcity of diamonds is a detail mentioned in the first paragraph and is not the main idea of the passage.

Good!

[[snippet]]

We know from the first paragraph that the passage discusses the effect, or impact, of advertising on business, and from the second paragraph that it discusses the specific case of the diamond industry.

the De Beers diamond cartel
the impact of advertising on the diamond business
the power of advertising
diamonds as an expression of love
the effect of the scarcity of diamonds on their prices