Which of the following statements concerning hybrid orbitals is/are correct?
A. The number of hybrid orbitals equals the number of atomic orbitals that are used to create the hybrids.
B. When atomic orbitals are hybridized, the s orbital and at least one p orbital are always hybridized.
C. For central atoms surrounded by more than an octet of electrons, d orbitals must be hybridized along with the s and all the p orbitals.