Tagriole, a herbicide used by many farmers, was recently shown by researchers to be slightly more toxic to individuals who accidentally come in contact with it while applying it than any of the alternative herbicides used for similar purposes. The same researchers, however, have concluded that it is generally safer to use Tagriole than to use any of the alternatives.The passage presents a situation that's surprising. After all, since "Tagriole ... was recently shown by researchers to be slightly more toxic to individuals who accidentally come in contact with it ... than any of the alternative herbicides," it's surprising that "The same researchers ... have concluded that it is generally safer to use Tagriole than to use any of the alternatives."
Which of the following, if it were known by the researchers to be true, would best explain why they arrived at the conclusion mentioned above?This question is a Paradox or Best Explains question, and the correct answer will explain why the researchers have concluded that it's safer to use Tagriole even though they have shown it to be more toxic than any of the alternative herbicides.
A. Tagriole requires only one application, whereas each of the alternatives requires frequent reapplications.This choice explains why researchers have concluded that it's safer to use Tagriole than any of the alternatives.
After all, if Tagriole is "slightly more toxic" but requires just one application whereas each of the alternatives requires frequent applications, then users would be much safer using Tagriole because they would have just one chance of coming in contact with it whereas they would have frequent chances of coming into contact with the alternatives.
Keep.
B. The use of Tagriole in combination with its alternatives can injure animals that prey on insects that damage farm crops.The researcher's conclusion is not about using Tagriole "in combination with its alternatives." So, this choice appears to be off topic.
Furthermore, the fact that using Tagriole in combination with its alternatives can injure animals would not be a reason to conclude that it's safer than alternatives.
Eliminate.
C. The manufacture of Tagriole involves the release of a very small number of atmospheric pollutants, each of which is very toxic.This information about "the manufacture" of Tagriole is not related to how safe it is to use if after it has been manufactured.
Eliminate.
D. Each of the alternatives to Tagriole costs farmers considerably more per acre to apply than does Tagriole.This information about cost is off topic.
The researcher's conclusion is about how safe Tagriole is to use. It's not that it's the least costly or best overall choice.
So, the fact that Tagriole costs less doesn't explain why the researchers concluded what they did.
Eliminate.
E. Herbicides that are dangerous to those who apply them are dangerous to those who live near the fields where they have been applied.If anything, this choice makes the researchers' concluding that Tagriole is safer more surprising, rather than explains it.
After all, if Tagriole is more toxic to users than other herbicides, then given what this choice says, Tagriole may also be more dangerous than other herbicides to those who live near the fields where it has been applied.
Eliminate.
Correct answer: A