In paragraph 1 of the excerpt from The Piano Shop on the Left Bank, the reason why the narrator describes the piano as "a strange and wonderful combination of the robust and the delicate" is:
This is a figure of speech which uses opposite ideas are placed in juxtaposition in a sentence as a result of their contrast.
With this in mind and from the complete text, we can see that antithesis was used to describe the piano as both robust and delicate and his was done by the narrator to show that the piano is special.
Therefore, the correct answer is option A
Read more about antithesis here:
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