All the Following Statements Are True

Multiple Choice

All the following statements are true.Which one can be attributed to the exclusion principle?

A) If we know the location of an electron quite well,we will have little idea where it is going next.
B) If an electron and antielectron meet,they will turn into energy through mutual annihilation.
C) An electron has energy equal to its mass times the speed of light squared.
D) Two electrons with the same spin cannot occupy the same energy level in an atom.