When dividing an existing Class B network into 2 subnets of 32,766 hosts each, which of the following subnet masks should be used?

When dividing an existing Class B network into 2 subnets of 32,766 hosts each, which of the following subnet masks should be used?

A.
128.0.0.0

B.
255.128.0.0

C.
255.254.0.0

D.
255.255.128.0