The first two sentences are definitely easier to pick out to diagram as they both start with "when" which we know is a S&N term.
However, we do not necessarily have to diagram the final sentence in order to draw our conclusion from it.
We know that recycled plastic is inevitably of a lower grade than the original plastic from which it was derived.
We also know that there are currently no applications for grades of plastic that are lower than the lowest commercial grade.
Therefore, we can conclude that recycling the lowest commercial grade of plastic would result in a plastic that has no applications. Why? Because recycling the lowest grade would result in a lower grade and we know that any grades lower than the lowest grade have no applications.
This is restated by answer choice (A), making it the correct answer.
Hope this is helpful! Please let us know if you have any further questions.
ValentinaJuly 15, 2020
To decipher Answer A, wouldn't we only need to refer to the 3rd premise? I'm having as hard time understanding why the other premises are relevant.
VictoriaAugust 26, 2020
Hi @Valentina,
The first premise is not relevant to the conclusion, but the second and third are.
The second premise is necessary for the conclusion because it tells us that recycled plastic is inevitably a lower grade plastic than the plastic from which it is derived. Therefore, plastic that is recycled entirely from the current lowest commercial grade would be of a lower grade than the currently lowest commercial grade, meaning that it has no applications, as outlined by the third premise.
Hope this is helpful! Please let us know if you have any further questions.
