The Increasing Concentration of Oxygen in Earth's Early Atmosphere

The increasing concentration of oxygen in Earth's early atmosphere

A) was favorable to numerous prokaryotes because of their flexible membranes.
B) was fatal to numerous eukaryotes because of their mitochondria.
C) conferred a selective advantage on eukaryotes that possessed mitochondria.
D) conferred a selective advantage on eukaryotes that possessed chloroplasts.
E) conferred a selective advantage on prokaryotes because of their stiff membranes.