The term that best fit the blank is RELEVANCE. The Google Adwords system is a system that is created by Google for the purpose of advertising online. Therefore, relevance is very important in this aspect as this shows how useful the ad is to the consumers who are doing the google search.
I think it's D because it's made out of facts. The other ones are more likely to include bias.
When you open MS Word, selecting the insert option and clicking
SmartArt, will pop up SmartArt dialog box. Double-clicking on one of the
graphic options in the middle panel will automatically select and place the
graphic art you want. It is an easy way of inserting a SmartArt of your choice without selecting
the art itself and clicking OK.
This type of freedom is called dreaming