The senior network engineer asked you to choose the last usable address for a host from the last subnet according to the following details:

Network 9.0.0.0 (Class A)
Mask 255.255.0.0 (for all subnets)

(A) 9.255.255.254
(B) 10.255.255.254
(C) 9.0.255.254
(D) 12.255.255.254

9.0.255.254 is the correct answer.