Nearly eight out of ten people all around the world use mobile phones. We always talk about the advantages of using mobile phones, but what about the disadvantages? First, a lot of people waste time by using the applications on the smartphones. Second, people make calls and send or receive messages while they are with their friends. Also, they are very expensive. In this paragraph, there is NO information about .....
A) disadvantages of mobile phones
B) number of mobile phone users
C) advantages of mobile phones
D) cost of mobile phones