Correct Answer: Rude

Solution : The correct choice is the fourth option .

In the given sentence, the context describes a murderer exhibiting behaviour that is contradictory to being polite .

The murderer is portrayed as rude and insensitive , which stands in direct contrast to the concept of being "polite". Therefore, the antonym for "polite" in this sentence is rude.

The meanings of other words are:

• Pleaded : This means to ask somebody for something in a very strong and serious way.
• Insensitive : This means someone who doesn't know or care how another person feels.
• Mercy : This means kindness that makes you forgive someone.