Why does the author mention "long, gruelin...

Câu hỏi: Why does the author mention "long, grueling hours without sleeps" in paragraph 4?

A To emphasize the difficulty of working as a plumber.

B To contrast the reality of a flight attendance's job with most people's perception.

C To discourage readers from choosing career as a flight attendance.

D To show that people must work hard for the career they have chosen.