The energy level for $A^{(+z-1)}$ is given by which of the following expressions?

• A
  $E_n \text{ for } A^{(+z-1)} = Z^2 \times E_n \text{ for } H$
• B
  $E_n \text{ for } A^{(+z-1)} = Z \times E_n \text{ for } H$
• C
  $E_n \text{ for } A^{(+z-1)} = \frac{1}{Z^2} \times E_n \text{ for } H$
• D
  $E_n \text{ for } A^{(+z-1)} = \frac{1}{Z} \times E_n \text{ for } H$