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 so as to和so that我常分不清,比如这题吧so as to的动作难道没有主语吗?还是有歧义?