20. For the purposes of driving safety, which of the following should be considered the top priority of drivers?
(A) the appearance of their vehicle
(B) safety, not time
(C) transportation infrastructure.
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統計: A(0), B(5), C(0), D(0), E(0) #2214481
統計: A(0), B(5), C(0), D(0), E(0) #2214481