Read the following passage and m...

Câu hỏi: Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.

A. Because fossil fuels are no longer available.

B. Because global warming has increased the amount of sunlight that reaches the earth.

C. Because they are free and available worldwide.

D. Because conventional energy resources are being depleted, and they cause environmental damage.