Child development specialists believe that, in confining babies much of the time to strollers, high chairs, playpens, and walkers, muscle development can be inhibited.
(A) that, in confining babies much of the time to strollers, high chairs, playpens, and walkers, muscle development can be inhibited
Muscle development can be inhibited for whom ?. Its not clear in the sentence. Meaning is distorted. A is Out
(B) that, in their confinement much of the time to strollers, high chairs, playpens, and walkers, muscle development can be inhibited in babies
Their confinement – Its totally wrong. The confinement of CD specialists cannot inhibit muscle development of babies. B is out.
(C) that confining babies much of the time to strollers, high chairs, playpens, and walkers can inhibit muscle development
Perfect .
(D) that babies, if confined much of the time to strollers, high chairs, playpens, and walkers can inhibit muscle development
Much closer . But still lengthy when compared with option C.
(E) that strollers, high chairs, playpens, and walkers can, if babies are confined to the much of the time, result in muscle development being inhibited
There are many issues with E. Being inhibited -awkward. Confined to what ?
So, C is the best choice