Final answer:
The statement that is not true is option a. Cost-benefit analysis (CBA) allows us to evaluate the costs and benefits of different treatments and select the most optimal treatment based on their cost-effectiveness.
Step-by-step explanation:
The statement that is not true in the options provided is option a. Cost-benefit analysis (CBA) allows us to evaluate the costs and benefits of different treatments and select the most optimal treatment based on their cost-effectiveness. However, it does not guarantee that the chosen treatment will be the most cost-effective among all potential treatments.