Answer:
The correct verb is "pensar", and the correct form of this verb is "piensas".
¿No piensas que es un poco tarde ahora, Tania?
Glossary:
Pensar: to think
Querer: to want
Tarde: late
Step-by-step explanation:
The correct ver in the sentence is "pensar" (piensas) since the other option wouldn't make sense.
Don't you think it's a little late right now, Tania? → Using "pensar" (piensas).
Don't you want it's a little late right now, Tania? → Using "querer" (quieres).
Hope it helped,
BiologiaMagister