Select the option that can be used as a one-word substitute for the given group of words.
An official inspection of a company's, or individual's, accounts

Let's look at the meanings of the given words:
Audit: An official inspection of an organization's or individual's accounts, typically by an independent body.

Survey: A general view, examination, or description of someone or something.

Documentation: Material that provides official information or evidence or that serves as a record.

Audition: An interview for a role or job as a singer, actor, dancer, or musician, consisting of a practical demonstration of the candidate's suitability.

Hence, Audit is the appropriate one-word substitute.