Which of the following, if true, most logically completes the passage below?
Certain microbes that are sometimes present on the skin of raw fruit can harm people if ingested in large numbers. Washing fruit in cold running water reduces the number of these microbes to levels where there are too few to harm anyone who ingests them. In countries where these microbes have been found on raw fruit, officials advise that raw fruit should be washed just before it is eaten, since __________.This question isn't too hard, but it illustrates well how Complete the Passage incorrect and correct choices commonly work.
We see that the blank is preceded by the support marker "since." So, the correct answer that fills the blank must provide support for the statement that precedes "since."
In other words, the correct answer must state why, in countries where microbes have been found on raw fruit, officials advise that raw fruit should be washed just before it is eaten.
(A) microbes that are present on the skin of fruit can sometimes contaminate raw vegetables with which they come in contactThe fact that microbes on fruit can contaminate vegetables may be a reason to wash fruit. However, it is not a clear reason to wash fruit just before it is eaten.
Rather, it would be a reason to wash fruit after purchase or before storage with vegetables, presumably well before it is eaten.
Eliminate.
(B) most raw fruit is highly perishableThe fact that raw fruit is perishable is not a reason to wash it just before it is eaten. After all, fruit would not "perish," i.e., break down or decay, in the last few moments before it's eaten.
Eliminate.
(C) most merchants who sell raw fruit are aware that the microbes can occur on the fruit they sellThe fact that merchants are aware that microbes can be on fruit is not a clear reason to wash it just before eating it.
This fact may help to confirm that microbes are present and that there is a need to wash them off at some point, but we need a reason to wash them off just before fruit is eaten.
Eliminate.
(D) the higher the temperature at which fruit is stored, the more rapidly the microbes multiplyNotice that this choice is about fruit that is "stored."
This fact about fruit that is stored is not relevant to washing fruit that is not about to be stored but rather is about to be eaten.
Eliminate.
(E) it takes just a few hours for a few microbes on the skin of a piece of raw fruit to multiply and reach dangerous levelsThis choice states a clear reason to wash fruit just before it is eaten.
Though, as the passage says, "Washing fruit in cold running water reduces the number of these microbes to levels where there are too few to harm anyone who ingests them," if this choice is true, then washing fruit even a few hours before it is eaten may not make it safe to eat. After all, by the time it is eaten, microbes on it may have multiplied to the point of reaching dangerous levels.
Thus, this choice provides a reason to wash fruit just before it is eaten, to reduce the number of microbes to safe levels without giving them time to multiply back to dangerous levels before the fruit is eaten.
Keep.
Correct answer: E