Product of acceptance and efficiency for D mesons in Pb-Pb collisions for the 0-10% centrality class. The rapidity interval is $|y| < y_{\rm fid}$ (see Section 3.1). The values for prompt (solid lines) and feed-down (dotted lines) D mesons are shown. Also displayed, for comparison, are the values for prompt D mesons without PID selection (dashed lines).