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Answer:
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.
According to the dictionary entry, the word 'regime' is (3.) a noun.
<u>The word 'regime' is a noun and it is mainly used to refer to a particular system of government of a country</u>. It usually has a negative connotation since it is associated with authoritarian governments. An example is: "The Nazi regime ended in 1945, the year in which Germany was defeated by the Allies". However, the word 'regime' can also be used to refer to an ordered way of operating and organizing things. It also functions as a noun in this sense.