Use the Following to Answer Questions

Use the following to answer questions :
Lean individuals and obese individuals have been shown to differ in terms of the species compositions of their gut flora.
-Which observation would best support the conclusion that a change in an individual's percentage of body fat alters his or her gut flora composition?

A) As an obese individual loses weight,his or her gut flora changes.
B) As an obese individual loses weight,his or her gut flora does not change.
C) An obese individual who is given gut flora from a lean individual loses weight.
D) An obese individual who is given gut flora from a lean individual does not lose weight.
E) The gut flora from an obese individual has reduced species diversity compared to the gut flora of a lean individual.