Escherichia coli or E.coli, is a species of bacteria. Entamoeba histolytica, or E. histolytica, is a single-celled amoeba. What do E. coli and E. histolytica have in common?

a. They live without an energy source.
b. They are unable to respond to changes in their environment.
c. They maintain homeostasis by cell specialization
d. They reproduce, or make more of their kind.