Pague la cuenta, por favor.
Pay the bill, please.
Sea amable.
Be nice.
Abra la ventana.
Open the window.
Actually the correct answer is D. tendrá. Because A would be if you were talking about yourself. B would be if you were taking about a group including yourself, and C would be right if you were talking about a group not including yourself.
Nosotros nos interesan la literatura espanola.
