When creating a Security Policy to allow Facebook in PAN-OS 5.0, how can you be sure that no other web-browsing traffic is permitted?

When creating a Security Policy to allow Facebook in PAN-OS 5.0, how can you be sure that no other web-browsing traffic is permitted?
A . Ensure that the Service column is defined as "application-default" for this security rule. This will automatically include the implicit web-browsing application dependency.
B . Create a subsequent rule which blocks all other traffic
C . When creating the rule, ensure that web-browsing is added to the same rule. Both applications will be processed by the Security policy, allowing only Facebook to be accessed. Any other applications can be permitted in subsequent rules.
D . No other configuration is required on the part of the administrator, since implicit application dependencies will be added automaticaly.

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Answer: D