Respuesta :
D. People realized they had been naive to think they were alone .
*(just took test- this was correct)*
The context clues show that the thing that happened in the twentieth century is D. People realized they had been naïve to think they were alone.
What are context clues?
It should be noted that context clues simply means the hints that are given by the author in a literary work.
In this case, the context clues show that the thing that happened in the twentieth century is that people realized they had been naïve to think they were alone.
Learn more about context clues on:
https://brainly.com/question/11247029
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