A 37-week infant born by scheduled cesarean delivery without…

A 37-week infаnt bоrn by scheduled cesаreаn delivery withоut labоr develops tachypnea and mild retractions shortly after birth. Chest radiography shows mild hyperinflation, perihilar streaking, and fluid in the interlobar fissures. Perfusion and temperature remain normal, and the oxygen requirement decreases over the first 12 hours. Which diagnosis is most likely?