From the worked example, the specific resistance of copper is approximately —

• a$1.7 \times 10^{-8}$ $\Omega m$
• b$5.5 \times 10^{-8}$ $\Omega m$
• c$100 \times 10^{-8}$ $\Omega m$
• d$1.0 \times 10^{12}$ $\Omega m$