For advertisers bidding on a maximum CPC basis, Quality Score on the Google Display Network is evaluated on the:

For advertisers bidding on a maximum CPC basis, Quality Score on the Google Display Network is evaluated on the:

A) clickthrough rate (CTR) of all keywords across the entire account and the relevance of the ad text and keywords to the advertiser’s landing page.
B) Quality Score of keywords across all campaigns and all ad groups.
C) CTR of the ad and the relevance of the ad and keywords to the publisher’s site.

Answer: C