Which of the following is a valid expression of the related rates of this reaction?

$2N{H}_3{N}_2+3H_2$

A$)$ Rate $=\frac{N_2}{}t=-\frac{H_2}{3}t=-\frac{N{H}_3}{2}t$

B$)$ Rate $=\frac{N_2}{}t=3\frac{H_2}{}t=-2\frac{N{H}_3}{}t$

C$)$ Rate $=\frac{N_2}{}t=\frac{H_2}{}t=-\frac{N{H}_3}{}t$

D$)$ Rate $=\frac{N_2}{}t=\frac{H_2}{3}t=-\frac{N{H}_3}{2}t$