How many different forms of communication are mentioned here ( )

A．When language is a barrier, people will find other forms of communication.
B．Everybody uses only one form of communication.
C．Nonlinguistic language is invaluable to foreigners.
D．Although other forms, apart from language of communication exist, they are of little value.

A．There are many forms of communication in existence today.
B．Language is the most common form of communication.
C．Tourists are incapable of using an oral form of communication.
D．Ideas and thoughts can be transmitted by body language.