What are the addresses falling into the range of 224.0.0.0 through 254.0.0.0?

A.
Class C network

B.
Class B network

C.
This is an experimental address range

D.
This is a broadcast range

Explanation:
see http://en.wikipedia.org/wiki/IP_address, http://en.wikipedia.org/wiki/Multicast_address

224/4 actually is multicast and 240/4 is reserved