At major hollywood companies a much greater proportion of

mundasingh123 wrote:At major hollywood studios a much greater proportion of the population is employed than is employed by independent movie production companies

B ) At Major Hollywood studios they employ a much a much greater proportion of the population than independent movie production companies do .
C)A Major greater proportion of the major holly-wood studios' population is employed than independent movie production companies employ
D)Major Hollywood studios employ a much greater proportion of the population than the employment of Independent Movie production companies
E)Major Hollywood studios employ a much greater proportion of the population than independent movie production companies do

OA E
I agree with the OA
What exactly is wrong with D as far as the grammatical structure / Meaning issues are concerned. If the comparison is wrong then why is it wrong .

mundasingh123 wrote:At major hollywood studios a much greater proportion of the population is employed than is employed by independent movie production companies

B ) At Major Hollywood studios they employ a much a much greater proportion of the population than independent movie production companies do .
C)A Major greater proportion of the major holly-wood studios' population is employed than independent movie production companies employ
D)Major Hollywood studios employ a much greater proportion of the population than the employment of Independent Movie production companies
E)Major Hollywood studios employ a much greater proportion of the population than independent movie production companies do

OA E
I agree with the OA
What exactly is wrong with D as far as the grammatical structure / Meaning issues are concerned. If the comparison is wrong then why is it wrong .