Sentence Correction

Congress is debating a bill requiring certain employers provide workers with unpaid leave so as to care for
sick or newbom children.
(A) provide workers with unpaid leave so as to
(B) to provide workers with unpaid leave so as to
(C) provide workers with unpaid leave in order that they
(D) to provide workers with unpaid leave so that they can
(E) provide workers with unpaid leave and


Explanation:
Choices A, C, and E are ungrammatical because, in this context, requiring ... employers must be followed by an
infinitive. These options display additional faults: in A, so as to fails to specify that the workers receiving the leave
will be the people caring for the infants and children; in order that they, as used in C, is imprecise and unidiomatic;
and E says that the bill being debated would require the employers themselves to care for the children. Choice B
offers the correct infinitive, to provide, but contains the faulty so as to. Choice D is best.


My Concern is that the "they" in choice D is ambiguous, is it referring to the Workers or Employers?

kindly help.

thanks