In paragraph 3, the word buoyant most closely means A. optimistic
What the word buoyant means
Buoyant as having a cheerful or lively spirit is used to describe someone or something that is cheerful, energetic, and full of life. This is similar to optimism, and it focuses more on the outward expression of positive emotions and a sense of lightness.
Another figurative use of "buoyant" describes something that rebounds easily from setbacks or challenges. This meaning implies a sense of resilience and adaptability, which isn't exactly the same as optimism.