[Q]: In the Kenya-Tanzania border Kenyan grassland gradually merges into Tanzanian forest. Though they had similar soil to start with millions of years ago, today they are two different habitats. At present, Kenya has one of the largest contiguous grassland in Africa. On the other hand, Tanzania boasts one of the largest forest cover in Africa. Would Kenya have thicker or thinner "A horizon" than Tnazania?
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[A]: thicker

[Q]: Dan harvested lots of fruit and decided to candy some of them to preserve them. He left some fruit fresh for the family to enjoy. He candied apples, pears, plums, and quince. He didn't candy oranges, blueberries, apricots and peaches. Which fruit retained their quality longer, plums or oranges?
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[A]: plums

[Q]: Two engineering students learned about petroleum products, While Dan learned more about plastics, Jim learned about fuels. Which student learned less about fuels for airplanes?
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[A]: Dan

[Q]: All marine creatures are not fish. There are some mammals, for example, whales, also live in the water. Rob wants to know more about differences between fish and other non fish creatures in the water. He divided them into two groups, group A and group B. Group A consists of fish, and group B consists of non fish creatures in the water. He started to see the differences between these two groups. In which group fertilization may take place outside of mother's body, group A or group B?
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[A]:
group A