一道逻辑难题

In testing for food allergies, a false positive resultoccurs when a person is said to be allergic to a particular food when, in fact,they are not allergic to that food. A false negative result indicates that aperson is not allergic to the food when, in fact, they are. To most accuratelydetermine food allergies, a physician should use the test that gives thesmallest percentage of false negative results because ______________________.


(A) Some food allergies cause reactions severe enough to be life-threatening.

(B) None of the tests for food allergies have lasting side effects.

(C) In diagnosing food allergies it is important to be as thorough as possible,since most people with one known food allergy have other undiscovered foodallergies.

(D) The proportion of tests that do not provide a clear result is the same forall tests of food allergies.

(E) All tests for food allergies have the same proportion of false positiveresults.

E是对的

求助各位大神 能否解释一下 为什么E对 还有 这个算难题吗？ 真心不明白  感谢大家了