Which of the following statements is true regarding the hydrogen atom?

• A
  $3s$,$3p$,and $3d$ orbitals have the same energy.
• B
  $3s$ and $3p$ orbitals have lower energy than $3d$ orbitals.
• C
  $3p$ orbitals have lower energy than $3d$ orbitals.
• D
  $3s$ orbitals have lower energy than $3p$ orbitals.