Question

this is an essential safety procedure that protects workers from injury while working on or near electrical circuits and equipment by locking the device and/or power source to prevent anyone from turning on the hazardous power sources while someone is performing maintenance or servicing work: select the best option. closeout lockout/tagout shutdown

Explanation:

Lockout/Tagout is a safety - procedure that involves locking the device and/or power source to prevent unauthorized startup during maintenance or servicing work. Closeout is not related to this safety - locking procedure, and shutdown is a more general term for powering off without the specific security - locking aspect.

Answer:

B. Lockout/Tagout