Although

[vidhya16]

Although a baby is already born with a sense of hearing, it is quite rudimentary, which means that it can hear high pitched sounds better and responds better to cooing, baby talk and, especially, feminine voices.

Although a baby is already born with a sense of hearing, it is quite rudimentary, which means that it can hear high pitched sounds better and responds better to cooing, baby talk and, especially, feminine voices

Although babies are already born with a sense of hearing, it is quite rudimentary, which means that it can hear high pitched sounds better and responds better to cooing, baby talk and, especially, feminine voices

Despite the fact that a baby is already born with a sense of hearing, it is quite rudimentary, which means that it can hear high pitched sounds better and responds better to cooing, baby talk and, especially, feminine voices

Although babies are already born with a sense of hearing, it is quite rudimentary, which means that they can hear high pitched sounds better and respond better to cooing, baby talk and, especially, feminine voices

Although a baby is born with a good sense of hearing, it is rudimentary, meaning it hears high pitched sounds better and responds better to cooing, baby talk and, especially, feminine voices

[ashutoshkumar7]

only D is parallel they can hear high pitched sounds better and respond better

[GmatKiss]

IMO:E

[crick]

I will go with D here.

E has pronoun reference error whereby "it" is used for hearing as well as for baby.

Crick

[vidhya16]

OA - D

[mundasingh123]

IMO E because In D , which cant modify a phrase