The diagram depicts a stage micrometer whose minor divisions are $0.1\,\text{mm}$. It is observed using an eyepiece that has a graticule. The stage micrometer is then changed to a slide containing a plant cell. What is the length of the nucleus?
- A$0.8\,\text{mm}$
- B$8\,\mu\text{m}$
- C$25\,\mu\text{m}$
- D$200\,\mu\text{m}$