Read the paragraph.

Violence in video games is essentially to blame for violence in our society. When children are bombarded with monstrous images, they begin to think that these types of actions are normal or acceptable. Children and teenagers are spending excessive numbers of hours playing video games, and they may begin to use them as a guideline for how to act and behave. Even if they do not perform violent actions, they may become less sensitive to the thoughts and feelings of others because of what they see reflected in these games.

The author most likely uses the word monstrous rather than the word “unpleasant” because it has

a more positive connotation than the word “unpleasant.”
a more negative connotation than the word “unpleasant.”
a more neutral connotation than the word “unpleasant.”
almost the same connotation as the word “unpleasant.”