A Proposed Mechanism for the Reduction of Nitrogen as NO $\rightarrow$

A proposed mechanism for the reduction of nitrogen as NO by hydrogen is:
Step 1: H₂(g) + 2 NO(g) $\rightarrow$ N₂O(g) + H₂O(g) (slow)
Step 2: N₂O(g) +H₂(g) $\rightarrow$ N₂(g) +H₂O(g) (fast) What is the rate law for the overall reaction?

A) k[H₂][NO]
B) k[H₂]²[NO]
C) k[H₂][NO]²
D) k[H₂]²[NO]²
E) More information is needed.