Average of relative $\Dzero$, $\Dplus$ and $\Dstar$ yields as a function of the relative charged-particle multiplicity at central rapidity (a) Average of relative D-meson yields in $\pt$ intervals (b) Ratio of the average relative yields in all $\pt$ intervals with respect to that of the $2< \pt< 4$ Gev/$c$ interval The results are presented in the top panels with their statistical (vertical bars) and systematic (boxes) uncertainties, apart from the feed-down fraction uncertainty, which is drawn separately in the bottom panels The position of the points on the abscissa is the average value of $(\dNdEta) \big/ \langle \dNdEta \rangle$ For some $\pt$ intervals the points are shifted horizontally by $1.5%$ to improve the visibility The dashed lines are also shown to guide the eye, a diagonal on (a) and a constant on (b)