Be Considered "Probiotic," Bacteria Must Meet All of the Following

Multiple Choice

be considered "probiotic," bacteria must meet all of the following criteria except:

A) they must be nonpathogenic when consumed.
B) they must be able to survive transit through the digestive tract.
C) they must be able to alter the intestinal environment in a beneficial way.
D) they must produce gas as a by-product of their activity.