One of your clients wants to know why a campaign went over the specified daily budget several days in a row. What would you explain to your client about how the Google Ads system works?

Due to changes in traffic, Google Ads allows up to 20% more impressions in a day than the budget specifies
To show an ad more often, Google Ads charges more than the average daily budget amount multiplied by 30.4
Google Ads automatically increases the maximum cost–per–click (CPC) bid to show an ad higher in Google search results
Due to changes in traffic, your total daily cost might be up to 2 times your average daily budget. However, with all Google Ads campaigns you won’t be charged more than your average daily budget multiplied by the average number of days in a month (30.4) – CORRECT