They complained . . . . . . . . your misbehaviour. A. about B. against C. to D. of

The correct answer is C. to.

The preposition “to” is used to indicate the person or people to whom something is said or done. In this case, the people who complained are saying something to the person whose misbehavior they are complaining about.

The other options are not correct because they do not indicate the person or people to whom the complaint is being made.

• About is used to indicate the subject of a conversation or discussion. In this case, the subject of the conversation is the person’s misbehavior.
• Against is used to indicate opposition to something. In this case, the people who complained are opposed to the person’s misbehavior.
• Of is used to indicate possession or ownership. In this case, the people who complained are not saying that they own the person’s misbehavior.

I hope this helps!