How might roots react when they encounter a region of the soil that is low in nitrates?

• A. Branch extensively so as to maximize the ability to absorb whatever nitrates are available
• B. Produce additional proteins for transporting and assimilating the available nitrates
• C. Produce additional root hairs to facilitate nitrate absorption
• D. Increase mycorrhizal associations so as to increase nitrate absorption
• E. Minimize branching