When an ideal gas with constant specific heats is throttled adiabatically, with negligible changes in kinetic and potential energies
A. dH = 0, dT = 0
B. dH > 0, dT = 0
C. dH > 0, ds > 0
D. dH = 0, ds > 0
where h, T, and s represent enthalpy, temperature, and entropy respectively.