Question: In this image, what does the circled button do?

1. It expands the comparison between the two files to include whitespace.
2. It allows you to delete the line of code to which it is connected.
3. It allows changes from one version of a file to be applied to another version of the file.
4. It allows you to merge both lines of code together.

Answer: The correct answer of the above question is Option C:It allows changes from one version of a file to be applied to another version of the file.