Final answer:
The phrase in question indicates that Titus is surprised to be cast in a role, corresponding to option b). This reflects the unpredictability and competitiveness of casting in theater, highlighting the role of a casting director in the process.
Step-by-step explanation:
The phrase 'to cast someone (in a role)' from the provided line 'What? You're casting me?' indicates that Titus is surprised to be cast in a role. Hence, the correct answer is option b). This reaction suggests that Titus did not expect to be chosen for a part in a play or production, which is a common experience in the competitive acting scene, especially in places like New York.
In the context of the historical references provided, it's worth noting that pantomime has been a longstanding form of theatrical expression. The given historical figure, an actor exiled in 18 BCE, indicates the long history and evolution of theater that contributes to today's casting practices and the importance of a casting director. These directors play a crucial role in selecting actors for stage and screen, understanding the director’s needs, and working within the constraints of quick turnarounds and the rigorous demands of the entertainment industry.