The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence. 

The reigning queen of all media in the US is talk-show host Oprah Winfrey. Her influence goes beyond her daily one-hour show into everything from the publishing business to the agricultural markets. Do you need proof? When Winfrey discusses an unknown author on her show, his book goes to the top of the best-seller charts.
Queen of（）