In act ii of hamlet, what does the queen believe caused hamlet to go insane?

The Queen would like to think that she is not the cause for her son's apparent madness, although she may still secretly fear that she is at least partially responsible.
Hope this helps!

The queen thinks that her son's apparent insanity may be his love for Ophelia 

Iam pretty sure the answer is c

Ibelieve this is the part where ulysses reveals his true identity to his faithful servants eumaeus and philaetius: his ragged vest then drawn aside disclosed the sign conspicuous, and the scar exposed: eager they view'd, with joy they stood amazed with tearful eyes o'er all their master gazed: these servants know ulysses by the scar he got when he was a child - so when he showed them the mark, they immediately knew this is truly their master and they hugged him, finally starting to believe his words.