What does Gus try to disprove in his conversation with his employer?

Gus's objective in the conversation with his employer is to argue against the notion that he should be fired. This indicates that there are specific allegations or criticisms directed at him, which he feels are unfounded or exaggerated. By focusing on disproving the idea of being fired, Gus likely aims to protect his job and reputation while addressing the underlying issues his employer has raised about his performance or conduct.

The context of the conversation is crucial; it reveals Gus's desire to stay employed and rectify any misunderstandings. The other options, while they could represent potential discussions in a workplace setting, do not align as closely with the overall goal of defending his employment status as directly as option C does.