You need to use source specific multicast, which addressing should you use ?

A.
224.0.0.0/8

B.
232.0.0.0/8

C.
248.0.0.0/8

D.
254.0.0.0/8

Explanation:
The 232.0.0.0/8 (IPv4) and FF3x::/32 (IPv6) block is reserved for use by source-specific multicast.
https://en.wikipedia.org/wiki/Multicast_address