[单选题]
A mole of diatomic oxyly h3m dz24obnpv5+f,i 6ojp 0gen molecules aephw 8 0.; xpbvj.r;sand a mole of diatomic nitrogen molecules at STP rp xe ;pbs0a w..v8h;jhave
A. the same average molecular speeds.
B. the same number of molecules.
C. the same diffusion rates.
D. all of the above
