The resistance, $R$, to electricity of a cylindrical-shaped wire is given by the equation $R=\frac{\rho L}{\pi d^2}$, where $\rho$ represents the resistivity of the wire's material, $L$ represents the length of the wire, and $d$ represents the diameter of the wire. What happens to the resistance of the wire as the diameter approaches 0?

AThe resistance approaches 0.

BThe resistance approaches $\pi$.

CThe resistance approaches $L$.

DThe resistance approaches infinity.