You need to remove any Microsoft Windows Internet Explorer 7 add-ons in Microsoft Windows Vista computers that do not have prior approval from the following authorities： Microsoft  System manufacturer  Service provider What should you do？ （）

A.Remove any add-ons that are not found in the list of downloaded ActiveX controls.

B.Remove any add-ons that are not found in the list of add-ons used by Windows Internet Explorer 7.

C.Remove any add-ons that are not found in the list of add-ons that run without requiring permission.

D.Remove any add-ons that are not found in the list of add-ons that are at present loaded in Windows Internet Explorer 7.