Which features are only supported with R81.10 Gateways but not R77.x?

Which features are only supported with R81.10 Gateways but not R77.x?
A . Access Control policy unifies the Firewall, Application Control & URL Filtering, Data Awareness, and Mobile Access Software Blade policies.
B. Limits the upload and download throughput for streaming media in the company to 1 Gbps.
C. The rule base can be built of layers, each containing a set of the security rules. Layers are inspected in the order in which they are defined, allowing control over the rule base flow and which security functionalities take precedence.
D. Time object to a rule to make the rule active only during specified times.

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Answer: C