The sentence from the article that best supports its author's assertion is D. Nuclear war was a new and terrifying possibility.
What is a Supporting Detail?
This refers to the use of evidence to validate a claim to show its veracity by either factual or statistical means.
Hence, we can note that from the given text, there is the narration of Golding's novel and how it made use of real-world events and this can be seen in option D that nuclear war was a new and terrifying possibility.
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