A:
Electricity generated during deceleration and braking
B:
Electricity generated during engine idling
C:
Battery is charged from the main supply
D:
Battery is totally discharged
Explanation
the term "regeneration" typically refers to the process of capturing and utilizing energy that would otherwise be wasted during deceleration and braking. The correct understanding of regeneration in hybrid vehicles is option (A): "Electricity generated during deceleration and braking."