What is one way that computer use has changed over time?
A、Computers were first used in homes, schools, and offices to send different kinds ofinformation, but now they are used only by the military to send sensitive information.
B、Computers were first used by the military to send sensitive information, but now they are used in homes, schools, and offices to send different kinds of information.
C、Computers used to send a person's voice from one place to another, but now they send only written content.
D、Computers used to send a person's voice from one place to another, but they have been gradually replaced by landline telephones. 无解析