23. What’s the best title of the article?
(A) The Abating Controversy Surrounding Biofuels
(B) The Imminent Food Crisis and How to Address It
(C) Why Biofuels Help Escalate World Food Prices
(D) Climate Change: The Culprit for Global Food Crisis

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統計： A(1), B(2), C(0), D(0), E(0) #3002799