Which two URL categories should be combined in a custom URL category to accomplish this goal?

An administrator wants to prevent access to media content websites that are risky.

Which two URL categories should be combined in a custom URL category to accomplish this goal? (Choose two.)
A . recreation-and-hobbies
B. streaming-media
C. known-risk
D. high-risk

Answer: BD

Explanation:

https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-new-features/content-inspection-features/url-filtering-multi-category.html

https://docs.paloaltonetworks.com/pan-os/9-0/pan-os-new-features/content-inspection-features/url-filtering-security-categories.html