The correct answer is A. 1.
When you rename a file, the original file is not deleted. The new file is created with the new name, and the old file is renamed to the original name. This means that there is only one file on the disk, even if you have renamed it multiple times.
Option B is incorrect because it assumes that the original file is deleted when you rename it. This is not the case. The original file is simply renamed to the new name.
Option C is incorrect because it assumes that the new file is created in addition to the original file. This is not the case. The new file replaces the original file.
Option D is incorrect because it assumes that there are five files on the disk after you have renamed the file five times. This is not the case. There is only one file on the disk, even if you have renamed it multiple times.