Which adverb of frequency best completes this conversation?
Pedro: Carlos, ¿tú estudiabas frecuentemente con Mariela?
Carlos: Yo
estudiaba con Mariela porque no la conocía bien.

answer is a: las

explanation:

the reason for this answer is becouse it's a plural frase which talks more then one thing

answerestan corriendo; i believe this is correct, plz check first good luck;