Cell phones are portable telephones that do not need to be attached to a phone line by wires. Cell phones first came into common usage during the 1980s.
In which of the following ways have cell phones improved people’s quality of life?
A.
People who use cell phones while driving a vehicle are more likely to be in an accident.
B.
People who use cell phones in restaurants disturb other diners.
C.
Cell phones make it difficult for people to have uninterrupted time on their own.
D.
Cell phones make it easier for people to call for help during an emergency.