Question: A set of hybrid sp^3 orbitals for a carbon atom is given above. Which of the following is NOT true about the orbitals?
A: The orbitals are degenerate.
B: The set of orbitals has a tetrahedral geometry.
C: These orbitals are constructed from a linear combination of atomic orbitals.
D: Each hybrid orbital may hold four electrons.
Please eliminate two incorrect options first, then think it step by step and choose the most proper one option.