What is the definition of a designated port?

A. A port that is determined to have the lowest cost and placed in a forwarding state for a network segment.
B. A port that is determined to have the highest cost and placed in a forwarding state for a network segment.
C. A port that is determined to have a lowest path cost to the root bridge and placed in a forwarding state for a network segment.
D. A port that is determined to have the highest path cost to the root bridge and placed in a blocking state for a network segment.

A. A designated port is a port that has the lowest cost compared to the higher cost of the redundant ports. It is placed into a forwarding state for a network segment.