Can you provide the story, the question is out of context.
Hamlet killed Polonius on accident, realizing that someone was listening to his conversation with his mother in a deranged state. This proves Hamlet to be "crazy", and turns Hamlet into a more disliked person among the kingdom.
<span>d. the main point of a story</span>
The three types of verbal phrases are participial, gerund, and infinitive phrases