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Distance From Objects

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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.

In lines 48-57, the author uses the example of looking at a distant object from a moving train in order to:

A

demonstrate how objects change position as a result of our own change of place.

B

demonstrate how powerful and exact a modern telescope can be.

C

explain early theories offered about the Earth and the sun.

D

further question methods of studying astronomy which have now become obsolete.