Which One of the Following Survey Questions Is Properly Phrased

Multiple Choice

Which one of the following survey questions is properly phrased?

A) "Aside from work you do at home or at a job, do you do anything to stay physically fit?"
B) "Do you agree with the Canadian Medical Association that smoking is bad for your health?"
C) "Have you ever had angina or cardiac fibrillation?"
D) "Do you jog and do sit-ups every day?"
E) "How many times a month do you engage in vigorous physical exercise for a period of at least 20 minutes?"