Correct, moreover you could have asked who is the subject of participle "recommending" .. Is it sedentary lifestyles, researchers. Basically the deal is that subject of the modifier should be unambiguous.
Don't you think that in this sentence structure of IC +DC, Verb-ing modifier is modifying the Big IC (IC+DC) here... I mean there is no ambiguity as such....
A is wrong because of reasons pointed out by pqhai...
Piyushk, Carcass....please chip in
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