Petroleum is believed to have originated from _______________ sources?
Correct answer: C. Both A. and B.
- A. Vegetable
- B. Animal
- C. Both A. and B.
- D. Neither A. nor B.
Explanation
The conventional biogenic theory attributes petroleum to the buried remains of both plant and animal organisms, transformed by heat, pressure, and geological time. Therefore, both listed biological sources are included.
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