Question

Select the statement that correctly shows subject-verb agreement.

A. Some students underestimate their capabilities.


B. Certain topics is more difficult to write about than others.


C. The online community allow students to talk easily.


D. The school library are a helpful resource for students.

Answer 1

the correct answer is A. Some students underestimate their capabilities.
Just to let you know why:
In B. the verb is singular and the subject is plural.
In C. the subject is singular and the verb is plural.
In D. the subject is singular and the verb is plural.