Which Suggestion Is Most Appropriate for Communicating with Hearing Impaired

Which suggestion is most appropriate for communicating with hearing impaired children?

A) Use a normal tone of voice, and do not exaggerate mouth movements.
B) Speak in louder voice at least 1 foot from the child.
C) If the child signs, give the sign first followed by the saying the word.
D) Stand up so that you can get the child's attention and command authority.