单项选择题

The author implies that scientists who regard the notion of a final state of truth without skepticism are
Ⅰ. More arrogant or unimaginative than scientists who see science as a perpetual process
Ⅱ. Visionaries who, though not necessarily correct, maintain an optimistic view of the future
Ⅲ. A very significant majority of the scientific community

(A) Ⅰ only
(B) Ⅱ only
(C) Ⅰ and Ⅲ only
(D) Ⅱ and Ⅲ only
(E) Ⅰ, Ⅱ, and Ⅲ