Why Didn't a Planet Form Where the Asteroid Belt Is

Multiple Choice

Why didn't a planet form where the asteroid belt is now located?

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