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