John is a nuclear scientist who works at the Fermi lab. Today, in front of him he has four samples, sample A, sample B, sample C, and sample D. Sample A is the naturally occurring uranium. Sample B is enriched uranium. Sample C is the U-238, and sample D is the U-235. He needs to figure out how to best use them. Given the paragraph above, please answer correctly the following question: Which smaple would not be fissionable, sample C or sample D?
Ans: sample C

Two friends met after 20 years and had a beer together. Vlad was a geologist and studied earthquakes. Mort was a pedologist and studied soils. They had some interesting conversations that night. Given the paragraph above, please answer correctly the following question: Which friend studied more about seismic waves?
Ans: Vlad

Keith was reading a book on climate. He found an interesting table that showed the climatic conditions of the earth in two different times, time A and time B. Time A showed earth's climatic condition in the previous century. And, time B showed earth's climatic condition in the present century. Keith was amazed to see how the world has changed in just a century. Given the paragraph above, please answer correctly the following question: Which period would be more harmful for habitat of species, time A or time B?
Ans: time B

Bob works as a scientist for a large fishing company in Norway. Norway's government has strict regulations on fishing to protect its fish stock. Part of Bob's job is to provide the government with fish mortality data. Today, he has two samples of fish to investigate, sample A and sample B. Bob concluded sample A had natural mortality, but sample B had fishing mortality. Given the paragraph above, please answer correctly the following question: For which sample disease would not be a cause of death, sample A or sample B?
Ans: sample B