Read the passage and choose the correct answer

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II. Read the passage and choose the correct answer.
The volume of traffic in many cities in the world today continues to expand. This causes
many problems, including serious air pollution, lengthy delays, and the greater risk of accidents.
Clearly, something must be done, but it is often difficult to persuade people to change their
habits and leave their' cars at home.
One possible approach is to make it more expensive for people to use their cars by increasing
charges for parking and bringing in tougher fines for anyone who breaks the law. In addition,
drivers could be required to pay for using particular routes at different times of the day. This
system, known as 'road pricing', is already being introduced in a number of cities, using a
special electronic card fixed to the windscreen of the car.
Another way of dealing with the problem is to provide cheap parking on the outskirts of the
city, and strictly control the number of vehicles allowed into the center. Drivers and their
passengers then use a special bus service for the final stage of their journey.
Of course, the most important thing is to provide good public transport. However, to get
people to give up the comfort of their cars, public transport must be felt to be reliable, convenient
and comfortable, with fares kept at an acceptable level.
1. Which of the following is NOT mentioned as a problem of the increasing traffic in cities?
A. serious air pollution
B. difficulty changing people's habits
C. traffic jams
D. greater risk of accidents
2. According to the passage, the problem can be solved by
A. making it more expensive to use cars
B. providing good, reliable expensive public transport
C. providing cheap parking in the city