Which of the following is true about the MPLS header and its EXP field size?

A.
The MPLS header is 2 bytes, and the EXP field is 3 bits long.

B.
The MPLS header is 1 byte, and the EXP field is 3 bits long.

C.
The MPLS header is 4 bytes, and the EXP field is 3 bits long.

D.
The MPLS header is 3 bytes, and the EXP field is 3 bits long.

Explanation: