Verbal and nonverbal communication can be integrated in order to do all of the following, except:
a.
accent or emphasize a part of verbal communication
b.
complement, or add meaning too, verbal communication
c.
contradict one another
d.
“turn off” nonverbal communication

The third alternative is correct (C).

There are different language codes in societies. People can communicate in written, verbal, non-verbal and even virtual ways.

Verbal language consists of direct dialogue with another person. Non-verbal language consists of a more complex communication code, which involves gestures, looks and expressions. However, in one form or another, you want to pass a message to the interlocutor. That way, if you use both forms of language at the same time, the signal must be the same, that is, verbal and non-verbal language should complement, not contradict.

For example, you can tell someone that you are happy (verbal form) and smile (non-verbal form of communication).

are there any options?