Hamlet question ()

in act 1 scene 2, claudius addresses prince hamlet as, "my cousin hamlet, and my son,"
referring to him as both his nephew and now his step-son, after claudius' marriage to hamlet's
mother. he then asks hamlet, "how is it that the clouds still hang on you? "
to what is claudius referring?

[claudius. take thy fair hour, laertes. time be thine,
and thy best graces spend it at thy will!
but now, my cousin hamlet, and my son-
hamlet. [aside] a little more than kin, and less than kind!
claudius. how is it that the clouds still hang on you?
hamlet. not so, my lord. i am too much i' th' sun.]

a. that hamlet has been depressed for too long, mourning his father's death
b. that hamlet has not shown the proper amount of grief over his father's (king hamlet's)
death
c. that hamlet has been happy lately, celebrating the marriage of his mother to his uncle