フリー問題

問題文

A reviewer at the co-op asks what the step does when only one column is handed to it, and how a length difference between two values is treated. Which pairing correctly states the column the step leans on in that case, and how the extra characters in the longer value are handled?

選択肢

1. When one column alone is chosen the step leans on a trimmed column, and every extra character in the longer of two values is omitted when the difference is worked out.
2. When one column alone is chosen the step leans on a trimmed column, and every extra character in the longer of two values is tallied when the difference is worked out.
3. When one column alone is chosen the step leans on a doubled column, and every extra character in the longer of two values is omitted when the difference is worked out.
4. When one column alone is chosen the step leans on a doubled column, and every extra character in the longer of two values is tallied when the difference is worked out.