A magnified image of a cell is shown in the diagram. The magnification is $\times 360$. Line LM gives the width of the cell image. In this diagram, line LM measures $18\text{ mm}$. What is the actual width of the cell?
- A$0.005\text{ mm}$
- B$0.05\text{ mm}$
- C$0.5\text{ mm}$
- D$5.0\text{ mm}$