A student is investigating how temperature affects the rate of transpiration. Which environmental conditions should be kept unchanged during this investigation?
- Ahumidity ✓, light intensity ✓, temperature ✓, wind speed ✓
- Bhumidity ✓, light intensity ✓, temperature ✗, wind speed ✓
- Chumidity ✗, light intensity ✓, temperature ✗, wind speed ✓
- Dhumidity ✗, light intensity ✗, temperature ✓, wind speed ✗