Suppose Health-Care Reform X Makes It Unlawful for Insurance Companies

Suppose health-care reform X makes it unlawful for insurance companies to deny insurance to persons with a preexisting disease.  One unintended effect of this reform is that some people

A) will buy more health insurance than they would have without reform X.
B) may wait until they have a particular disease before they buy health insurance.
C) will try to work longer hours, to earn more income, to pay for increasing health insurance premiums.
D) will be less likely to purchase health insurance than they would without reform X.