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
(B) that, in their confinement much of the time to strollers, high chairs, playpens, and walkers, muscle development can be inhibited in babies
(C)
that confining babies much of the time to strollers, high chairs, playpens, and walkers can inhibit muscle development(D) that babies, if confined much of the time to strollers, high chairs, playpens, and walkers can inhibit muscle development
(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
IMO C
option A has wrong preposition In
Option B Again repeats the same error , it also makes the sentence passive which is not desirable.
Option D suggests that babies inhibit muscle development.
Option E suggests that strollers high chairs etc inhibit muscle development but it is confinement to these things that inhibit muscle development.