When labeling pathways, which one of the following guidelines should be met?

Labeling should be affixed at the ends of each pathway.

Pathways should not be labeled at regular intervals to avoid labeling removal during cable installation.

Avoid marking conduits from the main equipment room (ER).

Pathways do not need to have unique identifiers as they are only supporting cables.

Only pathways containing fire/life/safety systems and electrical system should be labeled to prevent interference with other applications.