Problem: Adam is out camping and is ready to eat. He gets a can of baked beans and puts it over his campfire. He however did not puncture the can before doing so. Will the chance that the can of beans explodes increase or decrease not being vented over the fire?

A: increase

Problem: Ricky, an entomologist, is observing an ant colony in his back yard. After some observation, he discovers that all the ants travel down one of two distinct paths in order to find food to bring back to the colony. After taking some measurements, Ricky sees that path A is approximately 100 meters in length, and path B is approximately 150 meters in length. Ricky is now trying to make some scientific conclusions based on these observations. Which path will have higher pheromone density?

A: path A

Problem: 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 latex?

A: Group Beta

Problem: John is an automotive enthusiast. He was visiting the auto show in his city. Two cars caught his attention, car A and car B. Car A was newer and it had catalytic converter. On the contrary, car B was older and didn't have catalytic converter. But he found the design of older car more attractive. Which car would emit less carbon monoxide, car A or car B?

A:
car A