参考答案

正确答案：A
解析：事实细节题。根据第五段第二句话“an explanation delivered by an anchor person will replace actual photos of an event”“新闻节目主持人的解说会取代事件的真实镜头”，第三句“A decline in live coverage could send viewers away and drive ratings down…”“直播的下降可以把观众赶跑，使收视率下降…。”可知真实镜头代替文字说明可以提高收视率，排除选项C；第六段第三句话“A vivid pictorial report followed by less exacting materials allows the viewer to reflect on…flashed by”，第四句话“Frequent switches from one anchor to another…create a sense of forward movement”，最后一句“leading and tags to stories are worked out with field correspondents…so the audience's attention does not wander and more substance is absorbed”说明风格和节奏可以奏效，排除选项B和D。所以选项A为答案o