Final answer:
option a.c.d.The credential categories used in multifactor authentication include possession, knowledge, and inherence.
Step-by-step explanation:
One of the credential categories used in multifactor authentication is possession. This category involves something that the user physically possesses, such as a smart card, a token, or a mobile device.
Another credential category used in multifactor authentication is knowledge. This category involves something that the user knows, such as a password, a PIN, or the answer to a security question.
Lastly, inherence is also a credential category used in multifactor authentication. This category involves something that is inherent to the user, such as a fingerprint, a voiceprint, or an iris scan.