What Is the Purpose of Cyclic Electron Flow

What is the purpose of cyclic electron flow?

A) to prevent the formation of NADPH and excessive reactive oxygen species
B) to prevent the loss of light energy when the ATP production pathway is saturated
C) to ensure that all of the energy harvested by the sun is converted into ATP
D) to protect the cell when CO₂is unavailable and the Calvin cycle is not operating
E) to increase the net production of ATP in times when CO₂is unavailable