Which formula does Google use to rank keyword-targeted ads on Google Search

23) Which formula does Google use to rank keyword-targeted ads on Google Search


A)  (Maximum cost-per-click (CPC) bid + Daily Budget) / Quality Score

B)  Maximum cost-per-click (CPC) bid x Quality Score

C)  (Maximum cost-per-click (CPC) bid x Quality Score) / Daily Budget

D)  Maximum cost-per-click (CPC) bid only