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 particular gut flora compositions alter fat metabolism?

A) As obese individuals lose weight,their gut flora changes.
B) As obese individuals lose weight,their gut flora does not change.
C) Obese individuals who are given gut flora from lean individuals lose weight.
D) Obese individuals who are given gut flora from lean individuals do not lose weight.
E) The gut flora from obese individuals has reduced species diversity,compared to those of lean individuals.