The length of a coil of copper wire is a random variable with mean 150 $m$ and standard deviation 3.5 $m$.

If we choose five coils of wire at random, what is the variance of the total length of the wire in the coils?

A. $17.5m^{2}$
B. $87.5m^{2}$
C. $61.25m^{2}$
D. $0.8m^{2}$
E. $306.25m^{2}$