You Are Managing an AdWords Campaign for Your Organization

You are managing an AdWords campaign for your organization. You have two assistants who work with you to manage several ads through the Google AdWords Editor. You'd like to leave comments to items in the AdWords Editor to help communicate changes, inform your assistants, and allow them to respond to your queries. What's the correct path to leave a comment on an item in Google AdWords Editor?

A) You can't leave comments directly on items in Google AdWords Editor. You can attach items, such as .txt or .doc items to leave notes.
B) You can add comments to items in Google AdWords Editor. Select the item in Google AdWords Editor and click Add Comment at the bottom of the tab.
C) You can't leave comments directly on items in Google AdWords Editor. You can use a Notepad document (or any document in .txt format) and attach it to items.
D) and click Insert Comment from the Extras column.