Physical quantities — practice question

What would be a sensible estimate for the cross-sectional area of the wire in a paper clip?

• A$1 \times 10^{-3}\,\text{m}^2$
• B$8 \times 10^{-5}\,\text{m}^2$
• C$8 \times 10^{-7}\,\text{m}^2$
• D$1 \times 10^{-9}\,\text{m}^2$