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sum of the three-prong cross-feed backgrounds and other background components, respec- tively. Note that the three-prong cross-feed backgrounds are determined by the unfolding procedure previously described. 

Table IV summarizes various contributions to the systematic uncertainties on the branch- ing fractions. The uncertainty in the track-finding efficiency is estimated from a comparison of real and MC data for the D ∗ → πD $^{0}$, D 0 → ππK 0 $_{S}$( K 0 S → π $^{+}$π $^{−}$) decay sample. The uncertainties due to the kaon and pion identification are evaluated by applying the un- certainties in kaon identification efficiencies to the efficiency matrix in Table I. First, we 

