单选题 Growing economic problems were highlighted by a slowdown in oil output.
【正确答案】 C
【答案解析】[解析] 本题中,highlighted意为“使突出”。四个选项中,made prominent意为“使突出”;accounted for意为“说明,解决”;worked out意为“解决,计算出,消耗完”;taken for granted意为“认为理所当然”。只有C项符合题意。