What make a dwarf planet different from a planet?
A. 
Dwarf planets are usually smaller than the moons of a planet.
B. 
Unlike planets, dwarf planets do not have natural satellites.
C. 
Planets have cleared their orbital paths of debris, while dwarf planets have not.
D. 
Planets have a nearly spherical shape, while dwarf planets are irregular in shape.
E. 
Dwarf planets do not orbit in the same plane as the other planets.