Final answer:
Cassius's reference to 'Mark Antony, so well?' in Act II of 'Julius Caesar' likely indicates his skepticism or concern regarding Antony's ambitions and character in the midst of the conspirators' plans.
Step-by-step explanation:
In Act II of Julius Caesar, when Cassius says 'Mark Antony, so well?' he is likely expressing concern or skepticism about Mark Antony's intentions or character. This line could suggest Cassius's doubts about Antony's loyalty or his rising influence. Given the historical context of Antony's close relationship with Caesar, his ambitious nature, and his later alliance with Octavian and Lepidus to form the Second Triumvirate, Cassius's wariness is understandable. His mention could be interpreted as recognizing Antony's abilities and his potential to challenge or support the conspirators' plans to assassinate Caesar, leading to the turbulent power struggles that followed Caesar's death.