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) Comets do not contain enough deuterium to have solely created the Earth’s oceans.
(B) Given the ratio of deuterium to ordinary hydrogen in seawater, comets cannot have contributed to the Earth’s oceans.
(C) It is likely that comets contain less Xenon than meteorites do.
(D) Given the low level of deuterium in the waters of Earth’s oceans, comets cannot be its sole source.
(E) Comets now play a greater role in the creation of the Earth’s oceans than was previously thought.

(A) preposterous … augments
(B) reckless … belie
(C) perfidious … confirms
(D) guileless … underlines
(E) trustworthy … complicates