【单选题】Persons who are overweight should watch their diet carefully in order to lose pounds. The best way to do this is to start a weight control program. At first it is wise to talk with your doctor. He can...
A.
his health is good enough to do so
B.
he wants to do so.
C.
he has worked out a weight control program.
D.
he knows how many calories he should have each day.