The diagram depicts a stage micrometer whose small divisions are $0.1\,\text{mm}$, observed using an eyepiece fitted with a graticule. The stage micrometer is then swapped for a slide of 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$200\,\mu\text{m}$