All Computers on Your Network Use the 10

Multiple Choice

All computers on your network use the 10.10.0.0/16 address scheme. Tom, your manager, instructs you to place the 15 servers into a separate subnet that uses the 192.168.10 public addressing scheme. You must plan for a maximum of 25 servers in the future and need to configure a new subnet mask.
The subnet mask must allow a sufficient number of IP addresses for the existing servers and future growth. However, you want to conserve addresses as much as possible. Which subnet mask should you use?

A) 255.255.255.248
B) 255.255.255.240
C) 255.255.255.224
D) 255.255.255.252