Final answer:
The best correction for the modifier in the sentence is 'When I turned on the computer, I found that my files had been erased.'
Step-by-step explanation:
The best correction for the modifier in the sentence 'Turning on the computer, my files had been erased' is: 'When I turned on the computer, I found that my files had been erased.'
- By using the phrase 'When I turned on the computer,' the sentence clearly indicates the time and action taken.
- The corrected sentence maintains the subject-verb agreement and makes the sentence more coherent.
- The other options either change the meaning of the sentence or introduce irrelevant information.
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