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?

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