Which line does cassius deliver when trying to convince brutus to join forces with the conspirators?

a.
"nay, for mine own part, it was greek to me! "

b.
"brutus, my lord, make me acquainted with your cause of grief."

c.
"the fault, dear brutus, is not in our stars, but in ourselves, that we are 'underlings.'"

d.
"et tu, brute? "