How does a switch calculate the bridge ID?

A. The bridge ID is a 6-byte number containing a 2-byte bridge priority and 4-byte IP address.
B. The bridge ID is an 8-byte number containing a 4-byte bridge priority and 4-byte IP address.
C. The bridge ID is an 8-byte number containing a 2-byte bridge priority and 6-byte MAC address.
D. The bridge ID is a 10-byte number containing a 4-byte bridge priority and 6-byte MAC address.

C. The bridge ID is made up of a 2-byte bridge priority and a 6-byte MAC address for a total of 8 bytes.