Answer :
(B) Slow down and keep to the right, allowing the following vehicle to pass
Step-by-step explanation:
In option (a) it is given that we should speed up to increase so that there is a distance between you and following vehicle but if we speed up then there is a chance of accident we don't know about the mindset of following vehicle he may also increase his speed.And in option (c) it is given that maintain your speed and stay in the middle of the lane this is more dangerous because if we stay in the middle of the lane then there will be more chances of accident so option (b) will be the correct answer because if we slow down then there is no chance of any accident.