The supporting detail that backs up the given claim is: D. "Whatever power he has received, he has a corrupt nature that will improve it in one thing or other..."
This refers to the use of evidence to show and prove that a given claim is correct through the use of factual or statistical information.
Hence, we can see that from the original claim, the speaker stated that people in positions of power would naturally abuse such power and this can be supported by the detail in option D that states that "Whatever power he has received, he has a corrupt nature that will improve it in one thing or other..."
Read more about supporting details here:
https://brainly.com/question/884525
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