You should answer which type of music you like more—sad or happy. You can also mention why, for example, your mood, the atmosphere, or personal taste. Giving a reason will make your answer stronger.
你應該回答你更喜歡哪種類型的音樂——悲傷還是快樂。你也可以提到原因,例如你的心情、氣氛或個人喜好。給出理由會讓你的回答更有說服力。