Which of the following protects against unauthorized changes to data?

A.
Confidentiality

B.
Integrity

C.
Availability

D.
Alteration

Explanation:
B . Answer B is correct ; integrity protects against unauthorized changes to data.
Answers A , C , and D are incorrect. Confidentiality protects against unauthorized disclosure of data. Availability means systems are available for normal business use. Alteration is unauthorized changes to data: the opposite of integrity.