Multiple Choice
Which of the following are examples of commercial energy?
A) extracting oil, mining coal, and gathering fuelwood
B) using a solar cooker, burning natural gas, and mining coal
C) burning natural gas, gathering fuelwood, and instilling a windmill
D) extracting oil, mining coal, and burning natural gas
E) installing a windmill, extracting oil, and mining coal
Correct Answer:

Verified
Correct Answer:
Verified
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