(A) In IPv4 addressing, a block of address can be define as x.y.z.t / n in which x.y.z.t define one of the address and / n define the mask

(B) The first address in the block can be found by setting the rightmost 32-n bits to 0s

(C) Address of class C is used for multicast communication

(D) There are five classes in IPv4 address

(E) Supernetting combine several networks into one large network

Choose the correct answer from the options given below: