The correct answer is A. not to yield.
To put one’s foot down means to refuse to be persuaded or to do something that one does not want to do. In this case, the man has been harassed by repeated acts of injustice, and he has decided that he will not tolerate it any longer. He is determined to stand up for himself and to fight for what is right.
Option B, resign, is incorrect because the man has not decided to quit his job or to leave his position.
He is simply refusing to give in to the injustice that he is facing.Option C, to accept the proposal unconditionally, is incorrect because the man has not agreed to anything. He is still considering his options and has not made a decision yet.
Option D,
withdraw, is incorrect because the man has not backed down from his position. He is still standing up for himself and is determined to fight for what is right.