Which command should be used to check the cable length?

A technician implements a new copper connection to Gi2/0/20.

Which command should be used to check the cable length?
A . test tdr copper-length gigabitethernet 2/0/20
B . test copper-length tdr gigabitethernet 2/0/20
C . test tdr copper-port gigabitethernet 2/0/20
D . test copper-port tdr gigabitethernet 2/0/20

Answer: D