a) Mickey chose this topic because his family lived in London for several generations and his grandfather was a bus conductor for over thirty years.
b) As by 1900 there were around 6 million inhabitants in London and the means of transportation were not developed too much, the traffic was supposed to be quite heavy.
c) The transport companies decided to stop using horses because horses were expensive to keep.
d) The red buses became famous over the world because they had double decks and an open platform and they offered the best way to enjoy the sights of the city.
e. The private companies were encouraged to offer transport services because the number of population increased, London became a very large city and only one company could not provide the transport services for so great many people.