Information an advertiser would find in the Change History tool would be:
- A) changes made by the Ad Automator feature.
- B) adjustments made to the daily budget.
- C) credit card information associated with the account.
- D) timestamps for when ads were approved or disapproved.
Explanation: You can view all changes for a particular time period, filter the results by the type of change (such as budget adjustments or keyword edits), or see changes for a particular campaign or ad group.
You can read more here: //support.google.com/partners/answer/19888?hl=en