The extra stability of half-filled subshells is due to:
$(A)$ Symmetrical distribution of electrons
$(B)$ Smaller coulombic repulsion energy
$(C)$ The presence of electrons with the same spin in non-degenerate orbitals
$(D)$ Larger exchange energy
$(E)$ Relatively smaller shielding of electrons by one another
Identify the correct statements.

• A
  $(B), (D)$ and $(E)$ only
• B
  $(A), (B), (D)$ and $(E)$ only
• C
  $(B), (C)$ and $(D)$ only
• D
  $(A), (B)$ and $(D)$ only