Final Answer:
It is because of the emotional context conveyed through the speaker's statement about the joke. Therefore the correct option is a) Joyful.
Step-by-step explanation:
The speaker's choice of words and the tone used to describe the joke suggest a sense of joy and amusement. The statement might include positive language, laughter, or an overall light-heartedness, indicating a joyful response to the joke.
The speaker's use of enthusiastic language or positive descriptors reflects their joyful reaction. This could involve terms like "hilarious," "amusing," or "funny," conveying a sense of delight or happiness in response to the joke.
Therefore the correct option is a) Joyful.