Mercury Experiences Extreme High and Low Temperatures Between Night and Day

Multiple Choice

Mercury experiences extreme high and low temperatures between night and day because:

A) it is so close to the Sun.
B) its dense atmosphere creates a runaway greenhouse.
C) its oceans are much hotter than ours.
D) Mercury has no axial tilt, with its equator always exposed to direct sunlight.
E) it has no true atmosphere to moderate temperatures over the globe.