In act III, scene I, of Shakespeare's Hamlet, why does Hamlet speak rudely to Ophelia, telling her "Get thee to a nunnery"?

A. Hamlet is angry with Ophelia for spending too much time painting her face to beautify herself.
B. Hamlet is aware that he is being watched and that Ophelia is being used to spy on him.
C. Hamlet believes that Ophelia had a part to play in the murder of his father.
D. Hamlet has differences with Polonius in matters of the court.

PLS ANSWER ASAP