The Heisenberg uncertainty principle states that . Multiple choice question.

A)
electrons of atoms in their ground states enter energetically equivalent sets of orbitals singly before they pair up in any orbital of the set

B)
it is impossible to simultaneously know the precise position and velocity of a particle

C)
two atoms of the same element must have the same number of protons

D)
no two electrons in the same atom can have the same set of four quantum numbers