Respuesta :
The answer is D.
¿Qué piensas tú?
I’m not 100% but it wouldn’t work with ellos, or else you would need to change the conjugation of piensas to piensan.
¿Qué piensas tú?
I’m not 100% but it wouldn’t work with ellos, or else you would need to change the conjugation of piensas to piensan.