Most Meteorites Show Evidence of Having Melted or of Being

Most meteorites show evidence of having melted or of being fragments of asteroids that were once differentiated by heat.Carbonaceous chondrites,however,are believed to have never melted.Which one of the following sentences is NOT a reason we believe carbonaceous chondrites have never melted?

A) Carbonaceous chondrites contain complex carbon compounds that would have been broken down into simpler compounds by high heat.
B) The minerals in carbonaceous chondrites contain as much as 20% water. The water would have been driven out if the minerals had been heated.
C) Amino acids that are occasionally found in carbonaceous chondrites would have been destroyed by melting.
D) Carbonaceous chondrites do not show fusion crusts after passage through the EarthEarth''s atmosphere.