Which of the Following Led to the Creation of the Health

Which of the following led to the creation of the Health Belief Model (HBM) ?

A) Attempting to create an educational program that people would choose to attend
B) Attempting to explain why people acted as if they were immortal and immune from danger
C) Attempting to understand why people chose unhealthy and high-risk behaviors
D) Attempting to understand why people did not flock to free health care