Why Isn't There a Planet Where the Asteroid Belt Is

Why isn't there a planet where the asteroid belt is located?

A) There was not enough material in this part of the solar nebula to form a planet.
B) A planet once formed here,but it was broken apart by a catastrophic collision.
C) Gravitational tugs from Jupiter prevented material from collecting together to form a planet.
D) There was too much rocky material to form a terrestrial planet,but not enough gaseous material to form a jovian planet.
E) The temperature in this portion of the solar nebula was just right to prevent rock from sticking together.