How does this excerpt from "Feathered Friend" connect most clearly to one of the themes of the story?
It was one of those accidents that couldn’t possibly happen; we’d had one of our rare eclipses by Earth’s shadow that night: Part of the air purifier had frozen up, and the single alarm in the circuit had failed to go off.
A. It refers to an unexpected natural event.
B. It shows the excitement of manned space travel.
C. It explores the narrator’s concerns about bad air.
D. It reveals that technology is not always dependable
