Which two statements SECP are true? (Choose two)

Which two statements SECP are true? (Choose two)
A . CA servers must support GetCACaps response messages in order in implement extended functionality.
B . The GetCRL exchange is signed and encrypted only in the response direction.
C . It is vulnerable to downgrade attacks on its cryptographic capabilities.
D . The GetCACaps response message supports DES encryption and the SHA-128 hashing algorithm.
E . The GetCRL exchange is signed and encrypted only in the response direction

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Answer: AC