An Atom Is Most Stable When

An atom is most stable when

A) it can have one unpaired valence electron, allowing it to follow the octet rule.
B) it can share electrons with other atoms to form an uneven number of pairs of electrons.
C) it has eight electrons.
D) it can fill its outermost shell by sharing electrons or by gaining or losing one or more electrons until it is filled.
E) its outermost electron shell follows the quartet rule.