In Which of the Following Environments Would We Expect the Greatest

Multiple Choice

In which of the following environments would we expect the greatest difference in plant health between two groups of plants of the same species, one group with mycorrhizae and the other group without mycorrhizae?

A) where nitrogen-fixing bacteria are abundant
B) soil with poor drainage
C) soil deficient in mineral nutrients
D) near a body of water, such as a pond or river