Read the following excerpt from Tales from Shakespeare, Hamlet by Charles and Mary Lamb: In vain was all that his mother Gertrude or the king could do to contrive to divert him; he still appeared in court in a suit of deep black, as mourning for the king his father's death, which mode of dress he had never laid aside, not even in compliment to his mother upon the day she was married, nor could he be brought to join in any of the festivities or rejoicings of that (as appeared to him) disgraceful day.

What mostly troubled him was an uncertainty about the manner of his father's death. It was given out by Claudius that a serpent had stung him; but young Hamlet had shrewd suspicions that Claudius himself was the serpent; in plain English, that he had murdered him for his crown, and that the serpent who stung his father did now sit on the throne.

What does this passage reveal about Hamlet's character?

A. Hamlet is glad that his mother has remarried after the King's death.
B. Hamlet is still deeply upset about the death of his father.
C. Hamlet will join King Claudius and help rule the kingdom.
D. Hamlet will not rest until he has learned how his father truly died.