Given: 2A(g)+ B(g) $\rightarrow$ C(g)+ D(g)
When [A] = [B] = 0

Given: 2A(g) + B(g) $\rightarrow$ C(g) + D(g)
When [A] = [B] = 0.10 M,the rate is 2.0 M.s^-1; for [A] = [B] = 0.20,the rate is 8.0 M.s^-1; and for [A] = 0.10 M,[B] = 0.20 M,the rate is 2.0 M.s^-1.The rate law is

A) rate = k[A].
B) rate = k[B]².
C) rate = k[A][B]⁰.
D) rate = k[A][B].
E) rate = k[A]².