Final answer:
A security guard should identify themselves by showing their security guard license when a member of the public requests their identification, to ensure transparency and maintain public trust(option c).
Step-by-step explanation:
When a member of the public requests to see a security guard's identification, the guard should identify him/herself by producing their security guard license(option c).
It's important for security personnel to be transparent and accountable while on duty.
By law, security guards are often required to carry their license and present it upon request to verify their legitimacy. This ensures that both the public's safety and trust are maintained, and that the guards are recognized as authorized personnel.