You are driving on a one-way two-lane road and try to overtake a vehicle travelling ahead of you. The main danger in deviating to the left is:

1. ACrossing a continuous separation line.
2. BObstructing the vehicle travelling behind you in your lane.
3. CIn the lane on the left a vehicle travelling in the opposite direction may come.
4. DObstructing the vehicle travelling in the left lane.

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