What is the last usable address of the network 10.10.64.0 255.255.252.0?

What is the last usable address of the network 10.10.64.0 255.255.252.0?

A.
10.10.64.254

B.
10.10.67.254

C.
10.10.66.254

D.
10.10.65.254

Explanation: