A piece of modelling clay is transferred from a small measuring cylinder into a large measuring cylinder whose diameter is twice as large. The level reading on the small measuring cylinder decreases by $20\,\text{cm}^3$. What increase is shown on the reading of the large cylinder?
- A$10\,\text{cm}^3$
- B$20\,\text{cm}^3$
- C$40\,\text{cm}^3$
- D$80\,\text{cm}^3$