Answer:
D) Green building should be pursued primarily because they use less water.
Step-by-step explanation:
Options A, B and C present facts about green buildings. These are simply descriptions of what these buildings are, and although they might convince people of the benefits of green buildings, this is not their main objective. The point of the information is not to persuade, but simply to inform. However, option D does make an explicit attempt to persuade the reader. This is clear from the fact that the sentence argues that green buildings "should be pursued."