A Sacramento Valley Land Development Association pamphlet declared in 1911 that the "Sacramento Valley is one of the great valleys of the world, with a vast and fertile soil area. It produces great quantities of precious metals and structural materials. It is blessed with an abundant water supply, and an agriculture much more diversified than is found anywhere else on the face of the earth." Choose the word that is an antonym for abundant as it is used in this sentence from the first paragraph of the passage. A) beautiful B) insufficient C) normal D) plentiful