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 more instances of liver cancer?

A: Valley

Problem: Two students learned about soils in school. Brad had to study forest soils, while his colleague Frank had to study grasslands. They both did a good job and received A's for their efforts and accumulated knowledge. Which student read more about a rich diversity of animals?

A: Brad

Problem: Two people went to the eye doctor's office for an annual exam; James had farsightedness, while Bob had myopia. Which person had the eyeballs shorter than normal?

A: James

Problem: A scientist with an interesting idea for an experiment begins building a dome. This dome will be completely cut off from the rest of the world. It will produce all of its own resources, breathable air, anything needed to sustain life, putting it into a state of homeostasis. Given the dome experiment is a success and attains homeostasis, will it be in a stable or unstable state?

A:
stable