The Theorem of Equipartition of Energy States That the Energy $\frac{1}{2} m v^{2}$

The theorem of equipartition of energy states that the energy each degree of freedom contributes to each molecule in the system (an ideal gas) is:

A) $\frac{1}{2} m v^{2}$ .
B) $\frac{1}{3} k_{B} T$ .
C) $\frac{1}{2} k_{B} T$ .
D) $\frac{3}{2} m v^{2}$ .
E) $\frac{3}{2} k_{B} T$ .