Which statement explains the risk of an ordinary left-of-center pass near a hillcrest or curve that hides opposing traffic?

Correct answer: An oncoming vehicle may be hidden until there is no safe room to return

Why

Do not begin an ordinary left-of-center pass when a hillcrest or curve hides opposing traffic and makes the movement hazardous. You need enough clear distance to pass and return without interfering with anyone. Maine also restricts left-side passing near intersections and railway crossings and at obstructed bridges, viaducts or tunnels; the exact statutory exceptions, including qualifying bicycle or pedestrian passes, do not excuse an unsafe movement.

Verified against Maine Driver License Manual and Motorist Handbook · Passing restrictions · p. 67