Which Evolutionary Hypothesis Best Explains Why Microsporidia Lack Mitochondria

Multiple Choice

Which evolutionary hypothesis best explains why microsporidia lack mitochondria?

A) They became photosynthetic and could manufacture their own energy.
B) They became chemosynthetic and could manufacture their own energy.
C) They are primitive eukaryotes that never evolved this organelle.
D) They are prokaryotes like bacteria and thus lack nuclei and organelles.
E) They rely on a host organism for energy.