Question

what is the command form of comprar?
compran
compra
compres
compras

Explanation:

The verb comprar is a regular -ar verb in Spanish. The informal singular (tú) command form of regular -ar verbs is formed by taking the third-person singular present tense conjugation and dropping the final -s, then using that form. For comprar, the third-person singular present is compra, which is also the informal command. compran is third-person plural present, compres is the present subjunctive, and compras is second-person singular present.

Answer:

B. compra