The actual weight of a person is determined by his:

Correct option is C

​$$\textbf{Weight (W)} \text{ is the force exerted by gravity on a person's } \textbf{mass (m)} \text{ and is given by the formula:}$$​​$$W = mg$$

$$\text{where:}$$

$$W = \text{ Weight}$$

$$m = \text{ Mass of the person}$$

$$g = \text{ Acceleration due to gravity } (9.81 \text{ m/s}^2 \text{ on Earth})$$​​​​​​