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15. Suppose we execute the following command tr '[:lower:]' '[:upper:]' file.txt > Today is midterm exam >END The command will - A. put the words

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15. Suppose we execute the following command tr '[:lower:]' '[:upper:]' file.txt > Today is midterm exam >END The command will - A. put the words "Today is midterm exam" in the file.txt. - B. replace the lower cases by upper cases and display the words "Today is midterm exam" in the screen. - C. put the words "TODAY IS MIDTERM EXAM" in the file file.txt. Circle the correct response

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