This model has two general stages: the motivational phase and the volitional phase.​

A) ​The health belief model
B) ​The transtheoretical model
C) ​The health action process approach
D) ​The theory of planned behavior

The health action process approach proposes two general stages: the motivational phase and the volitional phase, which involve different processes and determinants of behavior change. The motivational phase focuses on goal setting, outcome expectancies, and risk perception and leads to the intention to change behavior. The volitional phase focuses on planning, self-regulatory strategies, and coping with barriers and relapses and leads to the initiation and maintenance of behavior change.