What impact do Polonius’s “asides” have on our understanding of the interaction with Hamlet?

a. They reveal Polonius’s thought process, and the fact that he believes Hamlet to be going insane.

b. They show the insecurities that Polonius has about his plan.

c. They reveal the secrets that Polonius is attempting to keep from Hamlet.

d. They clarify Hamlet’s plan for his feigned insanity.