Euglenas are single-celled organisms. What can you confirm about euglenas from this diagram?

Anatomy of a Euglena consisting of Photoreceptor, Stigma (eyespot), Chloroplast, Nucleus, Cytoplasm, Membrane, Nucleolus, Flagellum, and Contractile vacuole.

A.
They’re exclusively heterotrophs.
B.
They’re capable of photosynthesis.
C.
They make energy solely from fermentation.
D.
They must consume plants to perform cellular respiration.