Which moon has a very thick nitrogen atmosphere, making it somewhat Earth-like?

A. Titan

B. Triton

C. Callisto

D. Ganymede

The correct answer is: Titan!

Titan is a moon of Saturn (one of many, some of the others are: Rhea, Dione, Mimas). it's also the only other celestial body in which we have discovered stable liguids on the surface.

The Nitrogen in the Athmosphere gives it an orange-like appearance.