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Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. The resources needed by the growing hunting and gathering population increased rapidly once temperatures rose. B. Dramatic temperature increases and the simultaneous growth of the hunting and gathering population led to the need for more resources. C. Higher temperatures led to the existence of increased resources, thus enabling the hunting and gathering population to grow. D. The dramatic temperature increase occurred during the few years when abundant resources allowed the hunting and gathering population to grow.