Conclusion Backyard gardeners who want to increase the yields of their potato plants should try growing stinging nettles alongside the plants, since Support stinging nettles attract insects that kill a wide array of insect pests that damage potato plants. ██ ██ ████ ████ ████████ ███████ ████ ███████ ███████ ███ ████ ████ ███████ ██ ██████ ███ ███████ ██ ██████ ███████ ███ ████ ████ ██ ██ ███ ███████████ ████ ███████████████ ███████ ████████
We are asked to supply an additional premise to fill in the blank.
The author concludes that gardeners can boost potato yields by planting stinging nettles nearby. He explains that nettles attract insects that kill harmful pests. Although nettles also attract aphids, many of which can harm potatoes, the author says this doesn't contradict his recommendation because _______.
The author assumes that the nettles don’t harm the potato plants. He also assumes that, just because the nettles attract insects that kill pests, this will directly boost potato yields.
To effectively fill in the blank, the correct answer must somehow show that the aphids that are attracted to stinging nettles either don’t harm potato plants or else don’t harm them enough to affect their potato production.
Which one of the following ████ █████████ █████████ ███ █████████
stinging nettles require ██████ ████ ███ ████ ███ ████ ██ █████████
Irrelevant— this fails to show that the aphids that are attracted to nettles do not harm potato yields. Also, whether nettles are easy or difficult to cultivate doesn’t impact the argument that planting them can increase potato yields.
some types of ██████ ███ █████████ ██ ████████ ██████ ██████ ███ ██ ███ ██████ ████
Irrelevant— this addresses whether some of the aphids damage the nettles, but it fails to address whether the aphids damage the potato plants.
the types of ██████ ████ ████████ ███████ ███████ ██ ███ ██████ ██████ ██████
If the aphids that are attracted to the nettles do not damage potato plants, then the aphids don’t contradict the author’s recommendation to plant nettles nearby in order to boost potato yields.
insect pests typically █████ ████ ██████ ██ ██████ ██████ ████ █████ ███████ █████████ ██
Even if insect pests cause less damage than other organisms, they might still cause a lot of damage. (D) fails to address whether the aphids that are attracted to the nettles damage potato plants enough to reduce their potato yield.
most aphid species ████ ███ ███████ ██ ██████ ██████ █████ ███████ ████ ██ █████ ██████ ████ ██████
Irrelevant— it doesn't matter how much harm aphids cause to other plants. The argument is only about increasing the yield of potato plants, and (E) fails to show whether the aphids harm potato plants enough to reduce their yield.
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