What Is the Rate Equation of a Reaction a $\rightarrow$ C Which Has a First-Rate Order for [A] and Zero-Rate

What is the rate equation of a reaction A + B $\rightarrow$ C which has a first-rate order for [A] and zero-rate order for [B]?

A) rate = k[A]
B) rate = k[A][B]
C) rate = k[B]