Thanks for the question! There might be a couple of problems with the stimulus’s reasoning, but the main one is that petting an animal and owning an animal are similar, which isn’t necessarily true. In other words, a person who gets a lower blood pressure from petting an animal might not get a lower blood pressure from owning an animal, even if that would result in increased petting. We need something that parallels this flaw, and (A) doesn’t offer that. (A) also has another problem in that it discusses a healthy person versus a person who would be treated for an ailment (so a sick person), whereas the stimulus discusses the same person who would either own a pet or pet one. Thus, the flawed pattern of reasoning isn’t the same, and so (A) is the wrong answer. Hope this helps! Feel free to ask any other questions that you might have.