Which Is the Key Difference Between Aerobic and Anaerobic Respiratory

Which is the key difference between aerobic and anaerobic respiratory chains?

A) Aerobic respiratory chains that accept electrons depend on membrane- associated electron carrier molecules that carry out redox reactions while anaerobic chains use cytoplasm- associated molecules that carry out redox reactions.
B) Aerobic respiratory chains always use oxygen as the final electron acceptor while anaerobic respiratory chains may use a variety of inorganic substances other than oxygen as the final electron acceptor.
C) Aerobic respiratory chains are organized so that electrons are passing from a higher to lower energy state while anaerobic chains are organized so that electrons are passing from a lower to a higher energy state.
D) Aerobic respiratory chains accept electrons from both NADH and FADH₂ while anaerobic chains only accept electrons from FADH₂.
E) Aerobic respiratory chains are found in prokaryotic cells only while anaerobic chains are found in eukaryotic cells only.