We would expect the greatest difference in plant health between two groups of plants of the same species,one group with mycorrhizae and one group without mycorrhizae,in an environment

A)where nitrogen-fixing bacteria are abundant.
B)that has soil with poor drainage.
C)that has hot summers and cold winters.
D)in which the soil is relatively deficient in mineral nutrients.
E)that is near a body of water, such as a pond or river.