246 How many meters before turning at the intersection should the driver use the turn signal to warn others?
(A)100 meters
(B)30 meters
(C)10 meters.
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統計: A(2), B(0), C(0), D(0), E(0) #2215733
統計: A(2), B(0), C(0), D(0), E(0) #2215733