Q: Planet Earth and planet Mars both had breathable atmospheres and were inhabited by humans. People of Earth destroyed the ozone layer, people of mars were more careful and protected it. Which planet had fewer people using coolants?
A: Mars

Q: John and Keith are playing a decision making game. They have three decisions to make decision A, decision B, and decision C. Decision A and decision B have certain outcome, but decision C's outcome is uncertain. John would apply optimal decision making process while Keith would rather rely on his hunches. Will Keith most likely make or fail to make at least as good a known or expected outcome?
A: fail to make

Q: Two groups f people presented allergy symptoms. Group Alpha inhaled some allergens, but they were in a very protected environment, while Group Beta ingested some allergens and was exposed to a wide variety of other allergens. Which group had some people that were exposed to certain foods?
A: Group Beta

Q: Two roommates, Karen and Kelly, have decided to adopt a pet for their apartment. They are debating between getting a dog or a cat when they decide to flip a coin since they can't agree. The coin comes up tails so they are getting a cat. Unbeknownst to Karen, she is allergic to cats. Kelly has no allergies to animals, but Karen has never lived with cats before so she isn't aware that she is allergic to them. Who will struggle the most when holding the cat?
A:
Karen