Final answer:
Children, particularly those aged 8-12, are generally more susceptible to hypnosis due to their imaginative capacity and openness to new experiences. Hypnosis can also influence cognitive processes such as learning. Demographics are important for understanding population balances between different age groups. The correct option is D).
Step-by-step explanation:
The age group of people that is most susceptible to hypnosis is typically those who are younger, particularly children and adolescents. Studies suggest that children, especially those between 8-12 years old (Option D), are more susceptible to hypnosis compared to adults.
This increased susceptibility could be due to the greater imaginative capacity and openness to new experiences often seen in children.
When discussing cognitive processes that can be affected by interventions such as hypnosis, it's worth noting that research suggests learning may be influenced by such practices (Option A).
Additionally, considering the populations categorized by age, such as children (age 17 and under) and senior citizens (age 65 and over), a balance within a population's demographic can be established by determining what percentage are working-age adults (above age 17 to age 65). Option D) is the correct one.