Tests for pironoma

AIM GMAT wrote:In tests for pironoma, a serious disease, a false positive result indicates that people have pironoma when, in fact, they do not; a false negative result indicates that people do not have pironoma when, in fact, they do. To detect pironoma most accurately, physicians should use the laboratory test that has the lowest proportion of false positive results.

IMO E

Which of the following, if true, gives the most support to the recommendation above?
(A) The accepted treatment for pironoma does not have damaging side effects.
We are not talking about side effects
(B) The laboratory test that has the lowest proportion of false positive results causes the same minor side effects as do the other laboratory tests used to detect pironoma.
We are not talking about side effects
(C) In treating pironoma patients, it is essential to begin treatment as early as possible, since even a week of delay can result in loss of life.
we are discussing about methods to detect the disease not about its treatment
(D) The proportion of inconclusive test results is equal for all laboratory tests used to detect pironoma. The term inconclusive makes this statement wrong, we are not discussing the case when we get no result, we are talking about results which differ
(E) All laboratory tests to detect pironoma have the same proportion of false negative results. CORRECT This statement says that there is a consistency in results obtained from laboratory specially talked about false negative..obviously false negative is more serious issue than false positive