Given that Alice and Bob are using DES block cipher, and the Most Significant $18$ bits entered the substitution boxes $($S$-$boxes$)$ is $(101100000010011001)2.$ What is the third Most Significant hexadecimal digit output from the S$-$boxes?

Select one:

A$\mathrm{.}9$

B$.$C

C$.$E

D$\mathrm{.}6$

E$.$None