When someone clicks your ad, the actual amount you're charged will be:
A. The minimum needed to hold your ad position, under the maximum cost-per-click (max. CPC) limit.
B. The minimum needed to hold your ad position, but never less than 50% of your maximum cost-per-click (max. CPC) bid.
C. The minimum needed to hold your ad position, but never more than 120% of your maximum cost-per-click (max. CPC) bid.
D. The minimum needed to hold your ad position or 50% of your maximum cost-per-click (max. CPC) bid, whichever is greater.
