I don’t think this is a good-quality question — there are gaps in both answer choices
D and
E.
Answer choice D:“Some parents find the Dear One’s rigid shell makes harness fastening awkward, so they occasionally leave straps slightly loose.”
You could argue that occasional lapses by parents may not impact the company’s safety claim.
Also, for this answer to be correct, there has to be an
assumption that leaving straps loose affects safety. For all we know, the carrier could be so well built that leaving straps loose does not impact its safety. This point is not clear.
Answer choice E:“Pediatric safety experts have found that carriers that convert into car seats often fail to meet car seat safety standards.”
The word
“often” makes this answer weak.
To weaken the argument here, one would have to assume that the Dear One baby carrier also falls into the category of carriers that “often” fail to meet car safety standards. That is a stretch.
For the official question referenced in the link, the other four answer choices are clearly wrong because they don’t impact the conclusion. Even though a general category is used to prove a broad category in that question, it’s still more clearly defendable. In this question, however, two answer choices contain ambiguities, which negatively affects the quality of the question.