A、She drove after him and informed the police on her car telephone. B、She telephoned to the police on her car phone all the time

In the past few years, telephones in cars have become increasingly popular in the United States. At first, they were very costly; and then they cost less, so many people are now buying and using them. Police say people with car phones can report crimes and help catch criminals.
    In the southern State of Florida, more than 125,000 people have telephones in their cars. Almost one car in every 30 has a telephone. A man in a big city of Florida is one of these car phone owners. One evening as he arrived home, he saw two people he did not know leaving the house next door. He called the police on his car telephone and followed the strangers in his car. The police caught the two men. A woman in another city of Florida saw a man shooting at another man during an attempt of robbery. She called the police on her car phone and followed the gunman as he fled in a car. She told the police and the police stopped the man and caught him.
    Many people use their car phones to report other drivers who seem to have drunk too much wine. They also report accidents. This helps doctors and nurses get to an accident sooner to provide medical aid. All those car telephones are like having so many more sets of eyes and ears on the road. They help police to do their jobs better. Car phones also help drivers find the best way to get to a place. In some Florida cities, car phone owners can make free calls to radio stations to report when accidents occur or when too many cars block roads. The stations then broadcast warnings to other drivers to find different roads to use.