Read the paragraph. [1] Alejandro’s guidance counselor is helping him plan his schedule for next year. [2] She suggests that he take AP Chemistry and AP French to improve his chances of getting into college. [3] Neither he nor his parents thinks he’ll have time to do the work for both courses. [4] Alejandro plans to wait until the week before school starts to decide.

Which sentence has a subject-verb agreement error?
sentence 1
sentence 2
sentence 3
sentence 4