Which one of the following expression is the expression of maximum power theorem?

A

$$P_{max} = \frac{V_{Th}}{R_{Th}}$$

B

$$P_{max} = \frac{V_{Th}^2}{2R_{Th}}$$

C

$$P_{max} = \frac{V_{Th}^2}{R_{L}}$$

D

$$P_{max} = \frac{V_{Th}^2}{4R_{L}}$$