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Telescope's Importance

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Astronomy of Today, Cecil Dolmage
The following passage on astronomy was written by scientist Cecil Dolmage

Dolmage, Cecil. Astronomy of Today, a Popular Introduction in Non-technical Language. 3d ed. London: Seeley, 1910. WorldCat. Web. 23 Mar. 2016.

As it is read in context, the word "trifling" (line 2) most nearly means

A

irresponsible.

B

lacking.

C

trying.

D

controversial.