Which of the following are NOT among the world's main agricultural hearth areas?
A) North America's Mississippi and St. Lawrence Rivers
B) Middle East's Tigris and Euphrates Rivers
C) South Asia's Indus, Ganges and Brahmaputra Rivers
D) South America's Andes Mountains
E) Central America's Tamaulipas and Tehuacan Valley
Answer: A
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Indicate whether the statement is true or false
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Which of the following is an effect of high selenium concentrations in stream water?
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