To add a new folder you will click on the folder icon.

Option (a) is correct.

Explanation:

• In order to make a new folder, first of all, go to the new folder.
• Press the control, shift, and N keys to make a new folder.
• The above key is a new shortcut key to create a folder.
• After pressing the above keys, a folder icon will open.
• Now enter the desired name of the folder.