Final answer:
Choleric means to be easily angered or bad-tempered; thus, in the context provided, the government agent was angry.
Step-by-step explanation:
The term choleric is used to describe a character who is easily angered or bad-tempered. In the context given, where the agent of the government was described as choleric, it implies that he was angry or irritable, not happy, sad, or excited. This word is often used in literature to convey a distinct personality trait or emotional state. The excerpt provided contrasts the choleric demeanor with a sanguine and joyous one, underscoring the variability in human emotions and behaviors, especially under stress or in challenging situations.