"¿Por qué no _____ tu hermana y tú?" "Porque siempre nos peleamos."

Question

a. se despiden
b. se dien
c. se hablan
d. se gradúan

C?
if this is the wrong answer, then please explain the question to me

Answer 1

b is some sort of error. The answer IS C.

Sra

Answer 2

oops, B was supposed to be se dicen

thanks