Determine which of the following statements describes the electron's energy level as they pass along in electron transport.

• A. As electrons are passed along in electron transport, their energy level gradually decreases.
• B. As electrons are passed along in electron transport, their energy level gradually increases.
• C. As electrons are passed along in electron transport, their energy level increases exponentially at each stage.
• D. As electrons are passed along in electron transport, their energy level remains constant.

Answer: (A)