The answer should be D, nonverbal communication. One's willingness to do, say, or think something does not have to be communicated directly. It can be shown through other actions or behaviors.
Explanation:
Learning: The practice of developing new ideas or habits that are reasonably durable.
Memory: Overhead understanding that has continued through information encoding, preservation, & recovery.
Scientifically in the United States fifth graders would be in fifth grade
