Chickdaniel,
Gaius Julius Caesar was leader of the Roman Empire. Mark Antony never was. He was part of a triumvirate (with Octavian and Lepidus). Lepidus died. Octavian and Antony fought for supremacy. Antony lost.
ref clue 3.....the intended answer is Antony but I agree that technically I think it shoud be Caesar....I will ask that both answers are allowed....(it helps when your Dad wrote the quiz..lol)