He said this ironically as antony is attempting to portray brutus as ungrateful and treacherous. he succeeds in turning the roman people against brutus and the other assassins.
The length of the presentation should not be taken into account when determining bias, because it determines nothing except maybe how much a person has to say.
The Civil War was fought in 1861, so the answer would be D: 1800.
I believe the answer would be C or A