15. This sign means:

A. Road curves right, then turns left.

B. Advance warning of a winding road.

C. Advance warning of a low speed sharp left curve.

D. Advance warning of a left curve.

16. This sign means:

A. Pedestrians only, no vehicles traffic.

B. Pedestrians stop.

C. School advance warning, you’re entering school zone.

D. Slow down, pedestrians crossing ahead.