Acceptance-times-efficiency in Pb-Pb collisions (0-20% centrality class) for $\Dzero$ (left), $\Dplus$ (middle), and $\Dstar$ (right) mesons. The efficiencies for prompt (solid lines) and feed-down (dotted lines) D mesons are shown. Also displayed, for comparison, the efficiency for prompt D mesons without PID selection (dashed lines).