Ribbon only to content author and administrators

Question

Hi,
Recently I have taken up SharePoint 2013 exam and I got bit confused for one of the question i.e.
Adventure works uses a SharePoint publishing site to host their public facing website at
http://www.adventureworks.com.The website gives external users the ability to register and sign in to the site to buy Adventure works products. You notice that publicly registered users see the SharePoint ribbon.
You need to ensure that SharePoint ribbon available only to content authors and administrators. What should you do?
A) In the SharePoint project add and Empty element and then use the <HideCustomAction>tag to hide the ribbon
B) Open the current site master page in SharePoint designer, place the Sharepoint:SPSecurityTrimmedControl control around the div tag with the s4-ribbonrow ID. Set the PermissionString
to ManageSubWeb.
C) In the SharePoint project. Create a user control and add the following code segment to hide the ribbon
Page Load method
If(UserHasPermissions(SPContext.Current.web.CurrentUser))
SPContext.Current.Site.CommandUIVisible = true;
Else
SPContext.Current.Site.CommandUIVisible = false;
D) Open the current site master page in SharePoint designer and then place Sharepoint:SecurityTrimmedControl control around the div tag with the s4-ribbonrow ID.Set the permission
string to AddAndCustomizePages
E) Open the current site master page in SharePoint designer, find a div tag with the s4-ribbonrow ID and the remove all of the contents of the div.
I feel that both options D and E are applicable but I couldn’t come to conclusion.
Please share your opinion the same.
Regards,
Sudheer
Thanks & Regards, Sudheer

Answer 1

Believe  the option D is correct, removing all the contents in the s4-ribbonrow ID will hide the ribbon for all users.
--Cheers