27. In free healthcare, which might be a main reason for an unsustainable financial burden?
(A) Unequal distribution of medical resources.
(B) Difficulty in collecting money from employers.
(C) People's longevity.
(D) Workers' low income.
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統計: A(0), B(0), C(1), D(0), E(0) #3351928
統計: A(0), B(0), C(1), D(0), E(0) #3351928