Electron transport chain and oxidative phosphorylation 1

In terms of energy, which options about the flow of electrons in the electron transport chain (ETC) are correct?

(Choice A)
The energy released when the electrons flow can be stored by the cell.
(Choice B)
The electrons at the end of the ETC have a higher energy than those at the beginning of the chain.
(Choice C)
The energy absorbed when the electrons flow can be used to power $ATP$ ‍ synthesis.
(Choice D)
The electrons at the beginning of the ETC have a higher energy than those at the end of the chain.

From carbon dioxide to oxygen and back - Class 11