Final answer:
The ACE score is a measure of the prevalence of trauma in childhood.
Step-by-step explanation:
The ACE score is a measure of the prevalence of trauma in childhood (Option C). ACE stands for Adverse Childhood Experiences and refers to various types of traumatic events that individuals may have experienced during their early years. The ACE score is based on a questionnaire that assesses the exposure to ten different types of adversity, such as abuse, neglect, and household dysfunction.