(A) Default keyword bids at the ad-group level
(B) Summary Grid columns
(C) Demographic targets for campaigns
(D) Device targets for ad groups
(E) All of the above
You can do all of the above things with Microsoft Advertising Editor. You can select a default keyword bid at the ad group level by selecting the ad group first and then clicking on Search Bid and then typing in the keyword bid you want. You can customize the Summary Grid columns by right-clicking any column in the Summary Grid and selecting the checkboxes next to the columns you want to view. You can change the demographic targets by clicking on Targeting, selecting the Ad campaign and then selecting demographics, and changing the values you want. Similarly, you can change device targets by clicking on Targeting, selecting your Ad group and changing the targeted device to the one you want.
This question is a part of the Microsoft Advertising Certified Professional exam. You can find all the answers with detailed explanation for this exam in the Microsoft Advertising Certified Professional exam page.