The diagram represents the atoms in a substance, with the atoms located at the corners of a cube. At a certain temperature, the average distance between the atoms is $15\text{ nm}$. If the temperature alters so that the average distance becomes $17\text{ nm}$, by which factor does the density of the substance change?
- A$0.61$
- B$0.69$
- C$0.78$
- D$0.88$