Which one of the following statements best describes the relationship between the quality score and the cost-per-click of an ad in Google AdWords?
A. The higher akeyword's Quality Score, the lower the price you pay for each.
B. The higher a keyword's Quality Score, the higher the price you pay for each click and the better its ad position.
C. The higher a keyword's Quality Score, the lower the price you pay for each click and the better its ad position.
D. The higher a keyword's Quality Score, the higher the price you pay for each click and the higher the ranking of your ad over your competition.