Answer:
B. Scrambled data
C. Identifies users
Explanation:
The first mission of a security certificate is to encrypt/scramble data so if someone intercepts it, they won't be able to read it.
The second mission is to reassure the Website visitors that the company behind the Website you're dealing with is really who they are. It identifies the user of the security certificate, not the user of the Website.
The other functions described in A, D and E are local configurations done by the Website administrator, while the security certificate is managed by an external authority.
