easy · LSAT Logical Reasoning

Pet ownership has been shown to lower cortisol levels, a primary marker of stress. Thus, people with high-pressure jobs who adopt a dog or cat will experience improved mental well-being.

Which one of the following, if true, most strengthens the argument?

  1. A survey of emergency-room doctors found that those with pets reported less burnout and had lower resting heart rates than those without.
  2. Going to the gym is, for many busy professionals, just as good at lowering cortisol levels as quiet time with a companion animal.
  3. The combined cost of premium pet food, routine veterinary care, and pet insurance has climbed steadily for owners in every region of late.
  4. Adopting a single dog or cat completely and permanently eliminates every trace of job-related stress for absolutely everyone who works a job.
  5. Stress can stem from a wide range of competing sources, including demanding work, strained family ties, money worries, and poor sleep.

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