The faces of each of two fair dice are numbered $1$, $2$, $3$, $5$, $7$, and $8$. When the two dice are tossed, what is the probability that their sum will be an even number?

A. $\frac{4}{9}$

B. $\frac{1}{2}$

C. $\frac{5}{9}$

D. $\frac{3}{5}$

E. $\frac{2}{3}$