Please answer this: Two old friends Mary and Ann lived thousands of miles away. Mary lived on the Big Island of Hawaii, while Ann lived in Boston. Mary visited Boston, while Ann has never been to Hawaii. Which friend never visited Nihau Island?
++++++++
Answer: Ann
Problem: Scientists studied two groups of mammals. Group One developed natural selection after a few decades, while group Two didn't. It was yet to be determined why that happened. Which group will survive in smaller numbers?

A: group Two
Problem: Given the question: Doctors studied two groups of patients. Group W which had people with sickle cell disease, and group A which had normal people in it. Which group had more individuals inheriting the gene from both parents ?
++++++++++++++++++++++++++++++++
The answer is:
Group W
input question: John is comparing his medical record with his father's and son's medical records. John is 40 years old; his father is 70 years old; and his son is 10 years old. It appears that both John and his father has Retinitis. But his son does not have Retinitis. Whould Retinitis be a leading cause or minor cause of blindness for John????
output answer: leading cause
Two teams of researchers studied the environment in Antarctica. Team Black studied air pollution and the ozone layer, Team Red studied the water. Which team observed that the culprit are chlorine gasses?
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Answer: Black
Q: Bend city used a lot of fossil fuels to generate electricity. Hop city, another city from the same county, used only alternative sources of energy. Which city caused more eye cataracts?
A:
Bend