Read the sentence carefully.
a student who submits a research paper with a weak thesis and multiple sources are going to receive a higher grade than students who submit a research paper with a strong thesis and only a few sources.
which sentence corrects the error in subject-verb agreement?
a student who submits a research paper with a weak thesis and multiple sources is going to receive a higher grade than students who submit a research paper with a strong thesis and only a few sources.
a student who submits a research paper with a weak thesis and multiple sources is going to receive a higher grade than students who submits a research paper with a strong thesis and only a few sources.
a student who submit a research paper with a weak thesis and multiple sources are going to receive a higher grade than students who submit a research paper with a strong thesis and only a few sources.

A student who submits a research paper with a weak thesis and multiple sources is going to receive a higher grade than students who submit a research paper with a strong thesis and only a few sources.  

Explanation:

The sentence that corrects the error in subject-verb agreement is A) A student who submits a research paper with a weak thesis and multiple sources is going to receive a higher grade than students who submit a research paper with a strong thesis and only a few sources.  

In sentence A, the subject “A student” agrees with the verb “submits” in the dependent clause, and with “is going to” in the main clause. Furthermore, in the second part of the complex sentence, the subject “students” correspond with the verb “submit.”

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