In which sentence is the word periscope used correctly?

A. Excited about her finding, the scientist used a periscope to view the organisms in the water sample.****
B. On the night of the full moon, we used the periscope to look at the sky.
C. Sitting behind the tall stone walls, the soldier used a periscope to view the field surrounding the fort.
D. I held the periscope up to the light and was delighted with the many patterns I saw!

No.

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It is c

The correct sentence that uses the word "periscope" correctly is option A: "Excited about her finding, the scientist used a periscope to view the organisms in the water sample."