After You Click "Share" on a Presentation, a Drop-Down Menu

After you click "Share" on a presentation, a drop-down menu appears below the "Invite people" box. What is the function of this drop down menu?

A) It allows you to enter the names of invitees who can edit the file.
B) It allows you to enter the names of invitees who can only view the file.
C) It allows you to filter the invitees who can edit the file as well as view it.
D) It allows you to determine whether your invitees can edit the file or only can view the file.