Which of These Is the BEST Example of a BFOQ

Which of these is the BEST example of a BFOQ?

A) An organization requires that applicants be female because they will be monitoring security camera footage of the women's changing room.
B) A supervisor refuses to hire African-Americans because he believes they do poor work.
C) An airline requires flight attendants to be female because women provide a pleasant environment for passengers.
D) An organization is required to hire a minority applicant because an AAP is in place.