Which IP address range does the CIDR address 204.108.16/23 represent?

Which IP address range does the CIDR address 204.108.16/23 represent?

A.
204.108.16.0 to 204.108.19.0

B.
204.108.15.0 to 204.108.16.0

C.
204.108.16.0 to 204.108.17.255

D.
204.108.16.0 only