Language can refer to things that are not present in the immediate situation of the speaker. For example, if someone says I was afraid, it is not necessary that the speaker is still afraid. Which of the following terms describes this property of language

A．it is cheaper and faster than ordinary mail
B．it can send things that could not be expressed by telex
C．it is faster and not much more expensive than mail
D．the Royal Mail could not reach places abroad

A．by accident
B．because he couldn’t find a place to make a photocopy
C．because there was no place nearby to provide the photocopy service
D．because all sorts of people need it