Dựa trên nội dung các câu trong đề bài, thứ tự hợp lý của các câu sẽ như sau:

1. **c**: "Next my parents don’t permit me to go out with my friends without necessary reasons, for example my friends’ birthdays."
2. **d**: "Dear Anna, I have received your letter and I feel so glad when knowing that you have passed your examinations with good marks. You want me to tell you about my family rules."
3. **a**: "First, I’m allowed to watch TV during my free time, or when I have finished all my homework and exercises. Young children should receive lots of encouragement to follow family rules."
4. **e**: "Besides, I have to take a balanced diet to keep fit for my study. The daily routines make children feel safe and secure."
5. **b**: "I have told you something about my family rules. How about your family rules? I am really excited to hear about it. And I look forward to hearing from you soon."

Vì vậy, thứ tự chính xác là: **c - d - a - e - b**. Đáp án đúng là **B. c - d - a - e - b**.