Please answer this: Greg and Paul were two neighbors. They were both into mycology. Greg researched AM fungi, while Paul studied other types of mycorrhizal fungi. Which researcher learned more about the prevalence of AM fungi at higher soil nutrient concentrations?
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Answer: Greg
Problem: Bob has just graduated from medical school. He went on to serve his community. Especially he is interested in treating children. One day he saw two children, child M and child N, and found child M is infected with Acute Hepatitis B while child N is infected with Chronic Hepatitis B. Next day he saw two other children, child O and child P. Child O was younger, but child P was older. Did child N's illness occur within six months of exposure or the virus remained in his body?

A: virus remained in his body
Problem: Given the question: Two villages are inhabited by lots of people that ride bicycles. Hill village is located on a mountain and gets lots of rain, and Low village is situated in a valley, and has more sunny days. Which village has roads that are less slippery?
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The answer is:
Low
input question: As a part of his engineering job Keith is measuring the vapor pressure of two locomotives, engine A and engine B. Engine A has a high vapor pressure, but engine B has a low vapor pressure. He noticed that to increase the speed of the engines he needed to increase the vapor pressure. Which engine would have lower temperature, engine A or engine B????
output answer: engine B
Two brothers, Tom, aged 26, and Paul, aged 16 were into sports. Tom started weight-lifting to gain more muscle mass. Three years later he was 20-25 lbs. heavier. Paul started track and field, he liked running. Which brother didn't have all of the cartilage in the growth plate replaced by bone?
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Answer: Paul
Q: Iran an Iraq are 2 neighbors. Iraq produces its electricity by burning fossil fuels, while Iran uses nuclear fission as its energy source. Which country causes more environmental problems?
A:
Iraq