Which Statement Regarding a Pi Bond Between Two Carbon Atoms

Which statement regarding a pi bond between two carbon atoms is correct?

A) Regions of high electron density lie above and below the bond axis connecting the nuclei of the two atoms.
B) Can be described by the overlap of sp hybrid orbitals from each atom.
C) Can be described by the overlap of sp² hybrid orbitals from each atom.
D) Can be described by the overlap of sp³ atomic orbitals from each atom.
E) Can be described by the overlap of a p atomic orbital from one atom with an sp² hybrid orbital from the other atom.