lsat-12-4-13

There are tests to detect some of the rare genetic flaws that increase the likelihood of certain diseases. If these tests are performed, then a person with a rare genetic flaw that is detected can receive the appropriate preventive treatment. Since it costs the health-care system less to prevent a disease than to treat it after it has occurred, widespread genetic screening will reduce the overall cost of health care.

The argument assumes which one of the following?

(A) The cost of treating patients who would, in the absence of screening, develop diseases that are linked to rare genetic flaws would be more than the combined costs of widespread screening and preventive treatment.

(B) Most diseases linked to rare genetic flaws are preventable.

(C) The resources allocated by hospitals to the treatment of persons with diseases linked to genetic flaws will increase once screening is widely available.

(D) Even if the genetic tests are performed, many people whose rare genetic flaws are detected will develop diseases linked to the flaws as a consequence of not receiving the appropriate preventive treatment.（A）

(E) If preventive treatment is given to patients with rare genetic flaws, additional funds will be available for treating the more common diseases.

b也是假设吧，如果大多数与基因缺陷有关的疾病通过预防治疗还是不行，那么health care不会减少呀