Read the passage carefully, then choose the correct option marked A, B, C or D to answer the questions.

They called New York “the Big Apple”. Maybe it is not exactly like an apple, it’s certainly very big. There are too many people, that’s the problem. The streets are always full of cars and trucks, you can never find a place to park.

If you have enough money, you can take a taxi. New York cabs are yellow. They look all the same. But the drivers are very different. Some were born and raised in New York, but many are newcomers to the United States. A few drive slowly, but most go very fast. Cab driving is a difficult job. It can be dangerous, too. Thieves often try to steal the drivers’ money. Drivers sometimes get hurt.

If you don’t want to take a taxi, you can go by bus or you can take the subway. The subway is quick and it’s cheap, but parts of it are old and dirty. Lights don’t always work and there is often fire on the track. On some subway lines, there are new, clean, silver trains. But you can’t see the color of the old trains easily. There is too much dirt and too many graffiti, inside and outside.

What is the problem in New York? ~ __________.