Some cleaning fluids, synthetic carpets, wall paneling, and other products release toxins, such as formaldehyde and b...

Kweb1016 on December 28, 2020

Remember that must be true questions have correct answers that are 100% supported by the passage. With this in mind, we can eliminate both A and E, and select D as the correct answer.

Answer choice A says, "There will no longer be any need to ventilate the house." This is too strong to be 100% supported by the passage, as the passage states that house plants removes SOME toxins from there, not all of them. Further, the passage states that those eliminated toxins will no longer pose a threat, but it says nothing about those that will remain. With this in mind, we cannot say that the house will no longer need to be ventilated. It's just too strong.

Answer choice E says, "If formaldehyde and benzene are being released into the household air supply, the quantities released of each will decrease." You are correct that this is very similar to Answer choice D, but the difference here is key and alludes to the objective when it comes to identifying correct must be true answer choices: answer choice E goes one step too far when including benzene in the sufficient condition, as the passage only states that house plants, per the study, eliminate formaldehyde--it doesn't include benzene, therefore adding that piece of info in renders that answer choice only partially supported, not 100% supported, so it is wrong.

Hope this helps!!

on January 12, 2021

Kyle,

You're reasoning for eliminating E is incorrect. The addition of benzene is not the issue. The issue is that E states " the quantities released of each will decrease", with the emphasis being placed on quantities released. The passage only states that the household plants will decrease the levels of the toxins already in the air, but it never specified it had any effect on the amount of toxins being released into the house.