The PRIMARY reason for using digital signatures is to ensure data:

A.
confidentiality.

B.
integrity.

C.
availability.

D.
timeliness.

Explanation:
Digital signatures provide integrity because the digital signature of a signed message (file, mail, document, etc.)
changes every time a single bit of the document changes; thus, a signed document cannot be altered.
Depending on the mechanism chosen to implement a digital signature, the mechanism might be able to ensuredata confidentiality or even timeliness, but this is not assured. Availability is not related to digital signatures.