Stomata Admit CO₂ but Also Facilitate the Loss of Water;

Stomata admit CO₂ but also facilitate the loss of water; plants must regulate their stomata carefully or risk dehydration. A reasonable hypothesis associated with the global increase in atmospheric CO₂ is that plants will

A) evolve lower stomatal densities and reduce the potential for desiccation.
B) grow larger and more rapidly than they presently do.
C) keep their stomata closed most of the time to minimize carbon dioxide poisoning.
D) increase stomatal densities to take advantage of the abundance of CO₂.