What does SSL decryption require to establish a firewall as a trusted third party and to establish trust between a client and server to secure an SSL/TLS connection?

What does SSL decryption require to establish a firewall as a trusted third party and to establish trust between a client and server to secure an SSL/TLS connection?
A . link state
B . stateful firewall connection
C . certificates
D . profiles

Answer: C

Explanation:

https://docs.paloaltonetworks.com/pan-os/8-1/pan-os-admin/decryption/decryption-overview.html#:~:text=SSL%20decryption%20(both%20forward%20proxy,secure%20an%2 0SSL%2FTLS%20connection.