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 think he’ll have time to do the work for both courses. [4] Each of the teachers teach in a different way.

Which sentence has an indefinite-pronoun verb agreement error?
sentence 1
sentence 2
sentence 3
sentence 4