1.

(i) But in the last few years - in one millionth of the lifetime of our species on this planet - we have achieved an extraordinary technological capability which enables us to seek out unimaginably distant civilizations, even if they are no more advanced than we.
(ii) No matter how deep the concern or how dedicated the effort, human beings could not scratch the surface of the problem.
(iii) Radio astronomy has, in the last decade, opened a new window on the physical universe.
(iv) That capability is called radio astronomy and involves single radio telescopes, collections or arrays of radio telescopes, sensitive radio detectors, advanced computers for processing received data and the imagination and skill of dedicated scientists.

A. (ii) (i) (iv) (iii)
B. (ii) (iv) (i) (iii)
C. (i) (iii) (ii) (iv)
D. (i) (iii) (iv) (ii)
Answer» B. (ii) (iv) (i) (iii)


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