Size of specimens — practice question

A student makes a sketch of a root hair cell. The cell’s actual length is $0.8\,\text{mm}$ and the sketch is $80\,\text{mm}$ long. What is the magnification of the student’s sketch?

• A$\times 0.001$
• B$\times 0.01$
• C$\times 10$
• D$\times 100$