In Terms of the Nature of Listening, Which of the Following

In terms of the nature of listening, which of the following is true of sensing words?

A) Our mental concentration on the communication symbols that our senses can detect varies from moment to moment.
B) It is a fact that every person has the same ability to sense words.
C) How well we sense the words around us is determined by how often we use back-channeling.
D) Typically, a person's mental concentration consistently blocks out all sounds.
E) It is universally known that we all hear equally well.