Problem: People from two villages got infected with viruses and got sick. People from Hill village got infected with the flu, while people in Valley village got infected with hepatitis B. Which villagers will experience less damage to the liver?

A: Hill

Problem: John is a doctor with the local hospital. Earlier today, he was seeing two patients, patient A and patient B. John found out that patient A had more LDL, but patient B had more HDL. He now needs to determine correct treatment for them. Would patient B have higher or lower risk of heart attack than patient A?

A: lower

Problem: Mike was visiting the African Savannah. One animal that interested him most was the African Buffalo. He noticed that the buffaloes would usually live in a large herd, often exceeding few hundreds. He noted that as case A. But sometimes the buffaloes would live in a small herd. He noted that as case B. Interestingly, there are incidents when an aggressive male buffalo would live by itself. He noted that as case C. In which case the group would get more benefit as a whole, case A or case B?

A: case B

Problem: A windmill is used to power a nearby house. On days when there is almost no wind the house runs very low on power. But on days when there is a lot of wind, such as during a storm the reserve batteries for the house are able to charge to full. Will the amount of energy generated by the windmill increase or decrease if it is turning faster than normal?

A:
increase