How do teachers determine key concept vocabulary and action words to include on a device?

AAC refers to augmented and alternative communication which includes all of the forms of communication that is used to express needs, wants, thoughts and ideas. It is the ways of communicating, other than orally, which are used to express needs, wants, feelings. We also use AAC, when we are making gestures, symbols or picture, facial expressions and write.

Ithink the answer is b. shakeri hope im not wrong : )