an interesting question - grammar

One method of ending discrimination in business and industry is TO DEMAND QUOTAS TO BE MET BY EMPLOYERS.


A. to demand quotas to be met by employers.
B. demanding employers to meet quotas.
C. to demand that employers meet quotas.
D. that employers be demanded to meet quotas.
E. that of demanding employers to meet quotas.

Which one is correct an why? And why other options aren't ? ( I have a theory I'll keep to myself for now)

C

interesting example,
I'll keep quiet. Don't want to spoil the exercise.

oh sure, if the "natives" are going to play, then obviously my answer is ,,,,
c) of course

A is *almost* correct, so I can imagine some people hesitating between A and C. The other options aren't even in the running.

...to demand (that) quotas be met by employers.

>A is *almost* correct, so I can imagine some people hesitating between A and C

Same from me. I might hesitate at first glance, but 'c' is obviously the only correct answer.