An expression of mild disapproval

A. Reproof

B. Impertinence

C. Warning

D. Denigration

Answer: Option A

Solution(By Examveda Team)

One word substitute is Reproof.

Reproof: an expression of blame or disapproval.
Impertinence: lack of respect; rudeness.
Warning: a statement or event that warns of something or that serves as a cautionary example.
Denigration: the action of unfairly criticizing someone or something.