What best describes Enhanced Cost-Per-Click (ECPC)?
A. ECPC is a CPC bidding feature that automatically bids more aggressively in auctions more likely to result in a conversion.
B. ECPC is a Quality Score boost for advertisers using ad extensions.
C. ECPC is the discount applied to your Max CPC to determine actual CPC.
D. ECPC is a separate bid set for ad groups using the Conversion Optimizer.