A．Various forces outside the sender or receiver that make them unable to communicate.B．Various difficulties that a listener or receiver can experience when they have a cold.C．Various forces within a sender or receiver that cause them less able to communicate.D．Various reasons that can cause a person unable to take full advantage of his talents.
A．Various forces outside the sender or receiver that make them unable to communicate.
B．Various difficulties that a listener or receiver can experience when they have a cold.
C．Various forces within a sender or receiver that cause them less able to communicate.
D．Various reasons that can cause a person unable to take full advantage of his talents.