Answer:
C) Both A and B are examples of dangerous passing situations.
Explanation:
When there is a long line of traffic and there's an oncoming car ahead, it is best to wait till the car passes and then to ensure there is no oncoming car on the horizon before attempting a passing maneuver.
Likewise when you cannot see clearly ahead, it is advisable to wait until you can because there may be an oncoming car just around the corner.