Considering That Leaf Stoma Have the Conflicting Functions of Allowing

Multiple Choice

Considering that leaf stoma have the conflicting functions of allowing gaseous carbon dioxide into the leaf,yet preserving the plant's supply of water,which of the following is (are) reasonable?

A) A submerged-water plant would have no stoma.
B) Tree leaves that orient flat and present the top side to the sun would have most of their stoma on the bottom of the leaf.
C) Corn,oats,rice,and wheat-all monocots-have relative upright blades with sunlight hitting both sides and would have stoma distributed evenly on both sides.
D) All of the choices are reasonable.
E) None of the choices are reasonable,since stoma are found uniformly on all type of leaves.