What is the limitation of using a URL list and application control on the same firewall policy, in NGFW policy-based mode?

What is the limitation of using a URL list and application control on the same firewall policy, in NGFW policy-based mode?
A . It limits the scope of application control to the browser-based technology category only.
B . It limits the scope of application control to scan application traffic based on application category only.
C . It limits the scope of application control to scan application traffic using parent signatures only
D . It limits the scope of application control to scan application traffic on DNS protocol only.

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Answer: C