Galaxies that are moving away from Earth are O A. expanding
O B. shrinking
O C. blue shifted
O D. red shifted

The galaxies are moving away from Earth because the fabric of space itself is expanding.

Explanation:

option Aᕦ( ᐛ )ᕡ

red shifted

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

c.

explanation: