When We Say, "Sodium Ethoxide (Na⁺ EtO⁻) Acts as a Nucleophile

When we say, "sodium ethoxide (Na⁺ EtO⁻) acts as a nucleophile," we always mean

A) that the sodium ion accepts a pair of electrons from the electrophile.
B) that the oxygen donates a pair of electrons to a carbon atom.
C) that the oxygen donates a pair of electrons to a leaving group.
D) that the oxygen donates a pair of electrons to an electrophile other than hydrogen.
E) that the leaving group donates a pair of electrons to the electrophile.