Sentence Correction

The state has proposed new rules that would set minimum staffing levels for nurses, rules intended to ensure that at least one nurse is assigned for every four patients put through triage in a hospital emergency room.

A.rules intended to ensure that at least one nurse is assigned for every four patients put through triage in a hospital emergency room
B. rules with the intent of ensuring one nurse at least to be assigned for every four patients to be put through triage in a hospital emergency room
C. rules intending to ensure at least one nurse is assigned for every four patients in a hospital emergency room put through triage
D. with the intent of ensuring that at least one nurse should be assigned for every four patients in a hospital emergency room that are put through triage
E. and this is intended to ensure one nurse at least to be assigned for every four patients put through triage in a hospital emergency room

Abhijit K wrote:Sir,

However in A, the underlined clause is an independent clause. Can we join two independent clauses without a proper conjunction?? Does a comma suffice here?

Please throw some light on the use of comma.