An administrator has enabled Service Access on FortiManager. What is the purpose of Service Access on the FortiManager interface?

An administrator has enabled Service Access on FortiManager.
What is the purpose of Service Access on the FortiManager interface?

A. It allows administrative access to FortiManager. B. It allows FortiManager to respond to requests for FortiGuard services from FortiGate devices. C. It allows FortiManager to determine the connection status of managed devices. D. It allows third-party applications to gain read/write access to FortiManager.