Answer:
d. the increase in first-dollar medical insurance.
Step-by-step explanation:
According to this study, a large share of the increase in medical expenditures since World War II has been caused by the increase in first-dollar medical insurance. First-dollar medical insurance refers to a type of insurance that covers healthcare expenses without copayments or deductibles being paid first. It receives this name because the insurance begins paying expenses with the very first dollar charged for healthcare.