In an Effort to Lead a Healthier Lifestyle, You Reduce

In an effort to lead a healthier lifestyle, you reduce the amount of sugar in your diet and start using a sugar substitute that tastes sweet but is not taken up by mammalian cells.After a few weeks you experience stomach cramps and lethargy.Based on what you know about microbiomes, what would be a reasonable hypothesis to explain your discomfort?

A) The bacteria living in your gut have become aerobic and can no longer survive in your intestines.
B) The bacteria living in your gut have become pathogenic and are funneling nutrients from your cells.
C) The composition of bacterial species normally present in your intestines has changed, and thus compromised your body's ability to function normally.
D) The bacterial species in your gut have formed a biofilm.
E) You are allergic to the sugar substitute.