Q: Gary researched two old human settlements. Village A was smaller, it existed about 12,000 years ago. He also studied village B, which existed about 6,000 years ago. The village was much bigger and better developed. Which village had lower death rates?
A: Village A

Q: Two brothers took a blood test. The doctor found out that Tim had hemophilia, while his brother Rick had normal blood cells and was healthy. Which brother had a higher risk of internal bleeding?
A: Tim

Q: Two groups of people participated in a geriatrics study. Group D had people over 65 years old, while group Y had people in their 40's in its composition. Which group had people at lower risk of developing Alzheimer's disease?
A: group Y

Q: Two sister cities used petroleum products in different ways. Sin city used it for fuel, while Hill city used it only for making plastic materials which would then recycle. Which city used a chemical which is a mixture of compounds containing several carbon atoms in a chain?
A:
Sin