Carla is reading an article about a certain species of bacteria that can grow on the leaves of house plants. The article explains that the bacteria are heterotrophic.

A. The bacteria are probably eubacteria because they live on common plant leaves
B. The bacteria could be either eubacteria or archaebacteria because they are heterotrophic
C. The bacteria must be eubacteria because they are heterotrophic
D. The bacteria could be either eubacteria or archaebacteria because both types can live on plant leaves