"Even exercise professionals concede 'half a point here" (Sentence 2, Paragraph 2) means "
"Even exercise professionals concede 'half a point here" (Sentence 2, Paragraph 2) means "they ______".
A.agree that the calories in a small piece of pastry can be difficult to work off by exercise
B.partially believe diet plays a supporting role in weight reduction
C.are not fully convinced that dieting can help maintain one's new weight
D.are not sufficiently informed of the positive role of exercise in losing weight