Answer:
A.
Step-by-step explanation:
Insolent means being disrespectful in a mean kind of way and acting without any intention of being polite. While insolence is often associated with the behavior of subordinates towards an authority, it is also used to refer to disrespect in general.
In this passage, Danglars is insolent to his subordinates because he does not treat them nicely. This contrasts greatly with his behavior towards his superiors which can be described as fawning.