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What is the expected output of the following code if the file named existing_text_file is...

What is the expected output of the following code if the file named existing_text_file is a non-zero length text file located inside the working directory?

A.

the length of the first line from the file

B.

-1

C.

the number of lines contained inside the file

D.

the length of the last line from the file

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