PrepTest 22, Section 3, Question 20

Difficulty:

It would be wrong to conclude that a person has a Streptococcus infection if there is no other evidence than the fact that Streptococcus bacilli are present in the person's throat; after all, infection does not occur unless the host is physically run down.

Question

The reasoning in which one of the following is most similar to the reasoning in the argument above?

When a person experiences blurred vision, it does not follow that a physical defect in the person's eyes is the cause, since blurring of a person's vision also can be induced by certain drugs.

Even if a healthy lavender plant receives six or more hours of direct sunlight each day, one cannot predict on that basis alone that the plant will bloom, because lavender requires both six or more hours of sunlight per day and slightly alkaline soil to bloom.

When a bee colony fails to survive the winter, it would be wrong to conclude that low temperatures were the cause. Bees have very good defense mechanisms against extreme cold, which are designed to ensure survival of the colony, though not of individual bees.

A female holly plant cannot produce berries without a male plant nearby to provide pollen. But it does not follow that two or more male hollies in the vicinity will cause a female plant to bear more berries than it would with only a single male holly nearby.

A person cannot be presumed to be hypertensive on the basis of a high reading for blood pressure that is exceptional for that person, since only people with chronically high blood pressure are properly called hypertensive.

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