AnswerC
ExplanationComprehensive and Detailed Explanation From Exact Extract ISO/IEC 27000 standards:
According to ISO/IEC 27000:2018, Clause 3.35:
''Integrity is the property of accuracy and completeness.''
This is one of the three core principles of information security (CIA triad):
Confidentiality: ensuring information is not made available to unauthorized persons (related to option B).
Integrity: ensuring data is accurate, complete, and unaltered except by authorized means.
Availability: ensuring information is accessible and usable when required (related to option A).
Option D incorrectly mixes availability and confidentiality. The precise ISO definition is accuracy and completeness, which matches option C.
Thus, the correct verified answer is C.