What is the purpose of a zone in JUNOS Software?

What is the purpose of a zone in JUNOS Software?

A.
A zone defines a group of security devices with a common management.

B.
A zone defines the geographic region in which the security device is deployed.

C.
A zone defines a group of network segments with similar security requirements.

D.
A zone defines a group of network segments with similar class-of-service requirements.