Which statement best explains why a π bond cannot form between two atoms if each atom is sp3 hybridized and uses all three p orbitals in its hybridization?
a) Side-on overlap of sp3 orbitals is too weak to produce any bond at all.
b) Pi bonds require overlap of s orbitals, which sp3 hybrids lack.
c) All three p orbitals are incorporated into the sp3 hybrids, leaving no unhybridized p orbital available for the required side-on overlap.
d) The 109.5° bond angles in an sp3 arrangement physically prevent the necessary sideways overlap.