Saturn's Moon,Titan,has a Dense Nitrogen Atmosphere While the Planet Mercury

Multiple Choice

Saturn's moon,Titan,has a dense nitrogen atmosphere while the planet Mercury does not.Titan is better able to hold an atmosphere than Mercury because

A) Titan's mass is much larger than Mercury's (equal to Jupiter's) .
B) Titan is closer to the Sun than Mercury is.
C) Titan's mass is much smaller than Mercury's.
D) Titan is farther from the Sun than Mercury is.
E) Titan's atmosphere is much hotter than Mercury's.