💡 Detailed Explanation
Translation of Prompt & Choices:
- Prompt: Would you like another cup of green tea?
- Choices:
1. はい、お茶です (Yes, it is green tea)
2. いいえ、結構です (No, thank you - polite refusal) (Correct)
3. どういたしまして (You're welcome)
Explanation of Answer:
- When offered seconds or items ('〜はいかがですか'), if you want to decline politely, the standard phrase is 'いいえ、結構です' (No, thank you / I'm fine). Choice 2 is correct.