In an experiment, the resistance of a material is plotted as a function of temperature (in some range). As shown in the figure, it is a straight line.

One may conclude that

A

$$R(T) = R_0 e^{T^2/T_0^2}$$

B

$$R(T) = \frac{R_0}{T^2}$$

C

$$R(T) = R_0 e^{-T^2/T_0^2}$$

D

$$R(T) = R_0 e^{-T_0^2/T^2}$$