What is the general electronic configuration of actinoids?

• A
  $[Rn] \, 5f^{0-14} \, 6d^{0-1} \, 7s^2$
• B
  $[Rn] \, 5f^{1-14} \, 6d^{0-2} \, 7s^2$
• C
  $[Rn] \, 5f^{0-14} \, 6d^{1-2} \, 7s^2$
• D
  $[Rn] \, 5f^{0-14} \, 6d^{0-2} \, 7s^2$