Pine seedlings grown in sterile potting soil grow much more slowly than seedlings grown in soil from the area where the seeds were collected.This is most likely because

A)the sterilization process kills the root hairs as they emerge from the seedling.
B)the normal symbiotic fungi are not present in the sterilized soil.
C)sterilization removes essential nutrients from the soil.
D)water and mineral uptake are faster when mycorrhizae are present.
E)B and D.