13. The risk of ______ driving can be significantly reduced when a designated driver is appointed in advance.
(A)tailgated
(B) vandalized
(C) signaled
(D) impaired
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統計: A(2), B(8), C(2), D(4), E(0) #3923747
統計: A(2), B(8), C(2), D(4), E(0) #3923747