Answer:
A. The artwork was given to the city as a donation from the university.
Step-by-step explanation:
"The artwork was given to the city as a donation from the university." is the fact that most clearly suggests that the account is biased. This fact, if included in the account, would provide context and balance to the statement, and suggest that the mayor's actions might not be as unreasonable or hypocritical as the account makes them out to be. The omission of this fact suggests that the account is biased and is presenting a one-sided view of the situation.