Which of the Following Is True About the Definition of Child

Which of the following is true about the definition of child sexual abuse?

A) While there is disagreement on what constitutes sexual abuse, all experts agree that all children under the age of 18 can be child victims.
B) While the precise age of the child who can be subject to child sexual abuse varies from state to state, all experts agree that any physical contact for the sexual gratification of adults constitutes sexual abuse, and that contact is necessary for it to be considered abusive.
C) While states vary about the degree of sexual contact needed to constitute sexual abuse, all experts agree that sexual acts are abusive in children because they, by definition, cannot give consent.
D) There is disagreement on what constitutes a "child", what constitutes "sexual" and what constitutes "abuse" among experts.