The correct answer is A. about.
The word “about” is used to express interest in or concern about something. In this case, the man is tired of hearing about the complaints.
The word “of” is used to indicate possession or ownership. In this case, it would not make sense to say that the man is tired of the
complaints.The word “on” is used to indicate a location or position. In this case, it would not make sense to say that the man is tired on the complaints.
The word “in” is used to indicate a state or condition. In this case, it would not make sense to say that the man is tired in the complaints.