What is an effect of the Cache Timeout setting on the authentication source settings for Active Directory?

What is an effect of the Cache Timeout setting on the authentication source settings for Active Directory?
A . ClearPass will validate the user credentials, then, for the duration of the cache. ClearPass will just fetch account attributes.
B . The Cache Timeout is designed to reduce the amount of traffic between ClearPass and the A/D server by caching the credentials
C . The Cache Timeout is designed to reduce the amount of traffic between ClearPass and the A/D server by caching the attributes.
D . ClearPass will validate the user credentials on the first attempt, then will always fetch the account attributes

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Answer: A