An investigation was conducted into how light intensity affects the rate of transpiration. Every other variable was kept constant. A student was asked to explain the results displayed in the graph. Which explanation is correct?
- AAt light intensities above $30\,\text{au}$ the stomata close rapidly.
- BThe rate of transpiration increases as the light intensity increases.
- CThe rate of transpiration never falls to $0\,\text{cm}^3$ because some stomata are always open.
- DWater uptake by the plant increases as the light intensity increases from $0$ to $30\,\text{au}$.