plese help me please

Question

Each arrow shows an electron moving from one energy level to another. Which transitions will release energy? 

1. A and D
2. A and D
3. only A
4. only A
5. only C
6. only C
7. B and C
8. 
   

Answer 1

Energy is released when an electron FALLS from a higher energy level to a lower energy level. So,

A and D would be correct