A diamond-shaped sign that has one arrow point up and one arrow pointing down means:

Question A diamond-shaped sign that has one arrow point up and one arrow pointing down means:
A. Look ahead and behind you
B. Rough road ahead
C. Expect oncoming traffic
D. There are hills ahead

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Expect oncoming traffic

HINT: You should drive in the right-hand lane and expect oncoming traffic in the left-hand land.