The correct answer is A. talkative.
A jovial person is cheerful and good-humored. They are often the life of the party and enjoy being around people. They are usually talkative and enjoy sharing stories and jokes.
A morose person is gloomy and sullen. They are often pessimistic and negative. They may be quiet and withdrawn.
A monotonous person is boring and uninteresting. They may speak in a monotone voice and have a bland personality.
A quiet person is reserved and shy. They may not be as talkative as others, but they are often friendly and approachable.
In the context of the question, the man is described as having a jovial nature. This means that he is cheerful and good-humored. He is likely to be talkative and enjoy sharing stories and jokes. He is not likely to be morose, monotonous, or quiet.