Which of the following statements could be made about Louis Braille?
A. Louis learned how to read books using the Braille system.
B. Louis' accident ended up improving the lives of blind people everywhere.
C. Louis Braille could have used more support from his parents.
D. Louis Braille used his anger to improve his life.

B. Louis' accident ended up improving the lives of blind people everywhere.

Explanation:

The "accident" being referred to here is how Louis Braille became blind. As a young boy he slipped into his father's workshop and used a tool wrong which pierced his eye and caused infection, rendering him blind.

This caused him to be unable to read normally, which is why is why he had to consort to reading the raised bumps on a page, and eventually developing the Braille system which improved the lives of blind people everywhere.

the correct answer would be:  

a. adverb phrase

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