When Google Chose a New Model for Its Advertising,it Decided

When Google chose a new model for its advertising,it decided to

A) show advertisements that were the exact opposite of a consumer's profile to give the ads a higher awareness rate.
B) randomize the time periods between ads and banners rather than use a steady schedule in order to keep the ads more noticeable.
C) customize all advertisements based upon customers' preferences for color,music,and fonts based on information obtained from cookies.
D) create a "quality score" to predict how effective an ad would be based on factors such as click-through rates,advertiser history,and keyword performance.
E) create an "ad-option" page for consumers to create their own consumer profile-blocking out products and services they don't want and selecting the products and services they do.