Organisms with hard parts stand a good chance of being fossilized if they
a. rapidly decomposed by bacteria
b. slowly buried by sediments
c. rapidly eaten by scavengers
d. rapidly buried by sediments (my answer)

D is the correct answer. The fast it takes for them to be  buried the more common it is that they will become fossilized.
B is not true because the longer it takes, the less likely it will be fossilized, this is because it could possibly be moved the longer its there.

C.about 10% i think

Migration people get up and go cause they feel it is best for them