Problem: David wants to revisit the theory of evolution proposed by Darwin and Wallace. He is particularly interested in two species of deer, species A and species B. Species A has some helpful traits, but species B has some harmful traits. He is planning to write a paper on why some species are greater in number while others are smaller in number. Which species' traits would be more common, species A or species B?

A: species A

Problem: Two physicists studied the influence of kinetic energy on the environment. Will studied high temperature environments, while his pal Don studied cooler environments. Which person observed that particles with more kinetic energy feel warmer?

A: Will

Problem: Ronaldo and Jeff are two college roommates that have similar body structure and similar physical activity levels. Ronaldo is a nutrition enthusiast and eats a diet with appropriately low amounts of fat and cholesterol. Jeff, on the other hand, doesn't really care about nutrition at all. He eats whatever he wants, whenever he wants, and as a result he consumes a diet with an inappropriately high amount of fat and cholesterol. Who is more likely to have the disease atherosclerosis at some point?

A: Jeff

Problem: John is a world traveler. Recently, he visited two countries, France and Germany. He noticed that in France they use atmosphere and Pascal as pressure units. In Germany they use torr as a pressure unit. Back in the United States, he noticed psi is used as a pressure unit. He needs to figure out how they correlate with each other. Which county is using a unit mesured with millimeter, Germany or United States?

A:
Germany