reported speech เปลี่ยน present (S+V1) ไปเป็น past (S+V2) คือ เปลี่ยน have to เป็น had to และอีกอย่างคือ What ซึ่งเป็น question words ใช้เป็นตัวเชื่อม ดังนั้น ข้อ 3 คือคำตอบ
Reported speech to change present (S + V1) to the past (S + V2) is turning to had to have a. And What is that question words used as a link, so the answer is 3.
reported speech change present (S + V1) to the past (S + V2) is changed to have to be had to , and the other is the question words What is the connection so the 3 is the answer.
Reported speech change present (S V1) to past (S V2) is the change have to is had to and another is What which is. Question words use is to connect, so an 3 is the answer.