If you are unable to find your ad in the Microsoft Advertising Network results pages, why should you first examine the Impressions column in the Microsoft Advertising data summary tables?

(A) ​It tells you why your ad has been disapproved

(B) It tells you whether your campaign is active

(C) ​It shows the total number of clicks your ad has received

(D) It​ tells you if your ad is being displayed, even if you can’t find it