Would be better if you said "Did you know you can't spell beautiful without u?" and then I'd be flattered.
D.. I think. Although it's long, it best expresses the meaning of the two sentences it combined.
Yes. Because Cassius was the one who started the events that led onto Caesar's death and eventually on to his own death. Brutus did not like that Cassius was being un-loyal towards his own brother-in-law and therefore spoke up about it when they talked in the tent it act 4.