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Employing ________, Researchers Have Revealed a Huge Area in the Purus

Question 45

Multiple Choice

Employing ________, researchers have revealed a huge area in the Purus region of the Amazon rainforest that was home to perhaps 60,000 inhabitants in the thirteenth century.


A) Chemical analysis of the soil
B) Sonar technology
C) Scuba divers' observations
D) Aerial photography

Correct Answer:

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