What is the reason for confusion between Sebastian and Cesario at the start of Act IV?
aSebastian believes Feste is Orsino, but doesn’t understand why he is disguised as a fool.
bFeste believes Sebastian is Viola, who Olivia has sent for.
cSebastian thought Antonio was going to be with Feste, but Feste doesn’t know who Antonio is.
dSir Toby told Feste that Sebastian wanted to quarrel with him.
