If your vehicle emits black smoke while driving, what should you do?

If your vehicle emits black smoke while driving, what should you do?
A)Avoid driving, since in addition to the high pollution we produce, we may impair the visibility of other drivers.Correct
B)If the engine continues to work and the smoke does not affect our driving, we can continue on our way.
C)We will continue driving normally since it is normal for the vehicle to emit smoke.
Black smoke is the result of poor combustion which will considerably increase pollution due to CO emissions, so it is prohibited to drive polluting above certain established limits, and the vehicle may even be immobilised.
If the colour of the smoke is bluish it may be a symptom that it is burning oil, because it enters the combustion chamber due to a poor seal.
White is the usual colour when starting and beginning to drive, but only during the first few minutes and due to the accumulation of water that condenses inside the exhaust.