Mitochondria Are Proposed to Have Evolved Before Chloroplasts Based on Which

Mitochondria are proposed to have evolved before chloroplasts based on which observation?

A) Mitochondria produced the oxygen found in the atmosphere.
B) Mitochondria are larger, with more complex structure than chloroplasts.
C) All eukaryotes have mitochondria, but not all eukaryotes have chloroplasts.
D) All organisms have mitochondria and conduct cell respiration.
E) All prokaryotes have mitochondria, but not all prokaryotes have chloroplasts.