The diagram illustrates how the rate of photosynthesis changes as light intensity changes. The four curves represent different temperatures and carbon dioxide concentrations. What is limiting the rate of photosynthesis at point P?
- Alight intensity ✓, carbon dioxide concentration ✓, temperature x
- Blight intensity ✓, carbon dioxide concentration x, temperature x
- Clight intensity x, carbon dioxide concentration ✓, temperature ✓
- Dlight intensity x, carbon dioxide concentration x, temperature ✓