18. (D)
Question type: Assumption
We must honor a patient’s right to information even if it interferes with a doctor’s duty to see to her health and best medical interest"”this argument suggests"”because the right to information is a basic right. This makes sense if we assume that we should never violate a basic right, as (D) suggests. If we did not assume that, and a basic right was not inviolate, then why would we protect that right over a doctor’s duty?
(A) is out of scope.
(B) is somewhat tempting in that it seems to defend a doctor’s hypothetical decision to inform a patient regardless of how that affects the patient. However, the argument is not concerned with whether an argument is "right", just whether it should prevail.
(C) is out of scope. It’s not important why only persons have rights and objects do not. The argument is about why a right should prevail over a duty.
(E) is very attractive since it discusses a reason that one right should prevail over others, however, the argument is about why a certain right should prevail over a duty, not another right.