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 100+ points GMAT score improvement guarantee

The best guarantee you’ll find

Our Premium and Ultimate plans guarantee up to 100+ 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.

Sentence Correction: Preposition and Idiom Questions - Overview

Korean Buddhism, which began approximately 800 years after the death of Buddha, is characterized for its attempt to form a coherent and consistent form of thought and understanding.

This answer choice is grammatically incorrect. The correct idiom is characterized by, not characterized for.

Very good!

This answer choice uses the correct preposition (by) to form the idiom characterized by.

This answer choice is grammatically incorrect and repeats the original Preposition error. The correct idiom is characterized by, not characterized in.

Although this answer choice corrects the original Preposition error by replacing for with by to get the correct idiom characterized by, it creates a Subject Verb Agreement error.

The singular subject Korean Buddhism does not agree with the plural verb are.

What helps us identify this question as a Subject Verb Agreement question as well as identify the mistake is the following Stop Sign:

A long complex subject / a long distance between the subject and the verb

Although this answer choice corrects the original Preposition error by replacing for with by to get the correct idiom characterized by, it changes the meaning of the original sentence. The phrase understanding of thought is not the same as form of thought and understanding.

Korean Buddhism, which began approximately 800 years after the death of Buddha, is characterized for its attempt to form a coherent and consistent form of thought and understanding
Korean Buddhism, which began approximately 800 years after the death of Buddha, are characterized by its attempt to form a coherent and consistent form of thought and understanding
Characterized by its attempt to form a coherent and consistent form of thought and understanding, Korean Buddhism began approximately 800 years after the death of Buddha
Characterized by its attempt to form a coherent and consistent understanding of thought, Korean Buddhism began approximately 800 years after the death of Buddha
Korean Buddhism, which began approximately 800 years after the death of Buddha, is characterized in attempting to form a coherent and consistent form of thought and understanding