The table gives the relative concentrations of two mineral ions in a root cell and in the water in the soil surrounding the plant root. Water around root: magnesium ions $23$ arbitrary units, nitrate ions $19$ arbitrary units. Inside root cell: magnesium ions $2475$ arbitrary units, nitrate ions $1306$ arbitrary units. What is required for the plant root to raise the concentration of the mineral ions in its cells?
- Aenergy for active transport
- Benergy for osmosis
- Cwater for active transport
- Dwater for osmosis