Which of the following statements best explains why triethylamine [try-ethil-ah-MEEN] is more basic than ammonia?

W) Alkyl groups elevate the energy of nitrogen's nonbonding HOMO

X) Alkyl groups lower the energy of nitrogen's nonbonding HOMO

Y) Alkyl groups elevate the energy of nitrogen's nonbonding LUMO

Z) Alkyl groups lower the energy of nitrogen's nonbonding LUMO
W) ALKYL GROUPS ELEVATE THE ENERGY OF NITROGEN'S NONBONDING HOMO