Chinese meaning is second , which is b. B is valid response and inside given choices from user & assistant conversation. Mode 1 
```json
"{\"current_survey_question_id\": \"3\", \"mode_number\": \"1\", \"confirmed_choice\": {\"question_id\": \"3\", \"confirmed_choice_letter\": \"b\"}}"
```
哎哟，看来我们的小宝贝最近有点闷闷不乐呢。没关系，阿福会陪你度过这段时间的！下一个问题3是：在过去两周内，你是否有入睡困难、睡不安稳或睡眠过多的情况呢？选项有：a. 从来没有 b.少数几天 c.一半以上时间 d.几乎每天。请用字母a，b，c或d来回答哦！