Choose the word or phrase (a, b, c or d) that best fits the blank space in the following passage.
There is no (61)________ that in recent years the number of private vehicles on the road has increased significantly. This has (62)__________ to numerous problems such as a (63)_______ in air pollution, a higher accident rate and, of course, far more traffic (64)_______ . Some argue that if public transport played a greater role, then some of these problems might be (65)________. However, the current situation is unlikely to change dramatically in the near future (66)___________ certain actions are taken. There are two important changes that the government would need to make it in (67)________ for people to use public transport more. Firstly, prices would have to be reduced – (68)________ by train, in particular, is not cheap in this country. Secondly, the quality and frequency of public transport services would need to be (69)________. Many types of public transport are uncomfortable, unreliable, or simply (70)_____. In addition, more dramatic changes, such as higher car taxes or congestion (71)_______, might put some individuals (72)________ driving, particularly if there was a (73)_______ public transport service. (74) _______, it is important that the government aims to increase the role of public transport in order to (75)________ individuals to use it more. As a result, traffic-related problems might be reduced.
68____________
