Doubling the Concentration of a Leads to Doubling the Rate

Doubling the concentration of A leads to doubling the rate, while doubling the concentration of B has no effect on the rate. The rate equation is, therefore, ________. A + B → C

A) Rate = k[A][B]
B) Rate = k[A]
C) Rate = k[A]2
D) Rate = k[A]2[B]