Potato tissue cylinders were put into sugar solutions with different concentrations and left overnight. The lengths of the potato cylinders were measured both before they were placed in the sugar solutions and after the overnight period. The graph shows the findings of the investigation. In which sugar solution concentrations did the potato cells gain water?
- A$0.1$ moles per dm$^3$ and $0.2$ moles per dm$^3$
- B$0.1$ moles per dm$^3$ only
- C$0.2$ moles per dm$^3$ and $0.3$ moles per dm$^3$
- D$0.4$ moles per dm$^3$ and $0.5$ moles per dm$^3$