Problem: Two neighboring islands had different sized populations. Green island had a small population. Red island had a large population and environmental problems. Researchers studied these islands over a span of 5 decades. Which island had a higher birth rate?

A: Green

Problem: Pete lived in Alaska, but visited his friend Julia from Hawaii very often. They had many mutual interests, including geology and earthquakes. Which person lived farther from Loih volcano?

A: Pete

Problem: Beth and Jane studied chemistry in school. However, Beth studied noble gasses while Jane decided to know more about alkanes. Which student learned less about ethane?

A: Beth

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