55. The health insurance system is unsustainable because of the disapproval of _________.
(A) the employers
(B) the doctors
(C) the insured
(D) the company
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統計: A(56), B(10), C(22), D(14), E(0) #603203
統計: A(56), B(10), C(22), D(14), E(0) #603203