Please help me with this

Juan: ? hola, valeria! feliz cumplea? os. valeria: muchas gracias, juan. juan: valeria: tengo 16 a? os. a. ? qué a? os tenemos? b. ? cuántos a? os tengo? c. ? cuántos a? os tienes? d. ? cuántos a? os tienen?

Ineed with spanish because i suck at it. is this right?

Ithink this is wrong. someone check this . i retook this and it said i was wrong i think. also this is not an exam since is deleting “dishonest” pictures. it’s homework. but i still want a correct answer pls.