International audiencePHENIX presents a simultaneous measurement of the production of direct γ and π0 in d+Au collisions at sNN=200 GeV over a pT range of 7.5 to 18 GeV/c for different event samples selected by event activity, i.e. charged-particle multiplicity detected at forward rapidity. Direct-photon yields are used to empirically estimate the contribution of hard-scattering processes in the different event samples. Using this estimate, the average nuclear-modification factor RdAu,EXPγdir is 0.925±0.023(stat)±0.15(scale), consistent with unity for minimum-bias (MB) d+Au events. For event classes with moderate event activity, RdAu,EXPγdir is consistent with the MB value within 5% uncertainty. These results confirm that the previously observed enhancement of high-pTπ0 production found in small-system collisions with low event activity is a result of a bias in interpreting event activity within the Glauber framework. In contrast, for the top 5% of events with the highest event activity, RdAu,EXPγdir is suppressed by 20% relative to the MB value with a significance of 4.5σ, which may be due to final-state effects