Rachel is investigating an information security incident that took place at the high school where she works. She suspects that students may have broken into the student records system and altered their grades. If correct, which one of the tenets of information security did this attack violate?

A. Confidentiality

B. Integrity

C. Availability

D. Nonrepudiation

Option A

Explanation:

Confidentiality is keeping in secret details of a particular event, document or fact.

Here the grades of the students are in strict confidentiality and are meant to be kept save from unknown or unauthorized personal. The students broke into the system to get this scores and even alter the scores, it is a crime against confidentiality of the scores because they are very important documents the school keeps with strict confidentiality.