With this S/MIME function, anyone can view the message content, but only those with S/MIME capabilities can verify the message signature. a. enveloped data
b. signed and enveloped data
c. clear-signed data

The correct option is c. clear-signed data.

Explanation:

Clear-signed data enables a digital signature to be created by encrypting the message digest of the material to be signed using the signer's private key. But only the digital signature is encoded with base64 in this scenario. As a result, recipients who do not have access to S/MIME can see the content of the message but the message signature cannot be verified by them.

Based on the explanation above, the correct option is therefore c. clear-signed data.

this seems to be in the wrong category. but i'll take some free points my dude

posting this in wrong category will result in people seeing it who won't know the answer.