18. In order to avoid unnecessary trouble for the 'patients' and to minimize health care costs, the aim in screening for disease x is to admit as few healthy (e.g. not having disease x) people as possible into the health care system. In achieving this, which one of the next test parameters (in percentages) should be as small as possible: TP (true positive), FP (false positive), FN (false negative) or TN (true negative)?
(A) FN (false negative).
(B) TN (true negative).
(C) TP (true positive).
(D) FP (false positive).