Which approach should you recommend?

You are designing a maintenance plan for a SharePoint 2010 intranet site. You have the following requirements:
The site has 25 custom content types and 5 document libraries. One of the document libraries has more than
1,000 documents.
.Every document in the site is associated with one of the custom content types.
.Each document library has a single view, showing the name of the document and the person who last modified it.
.Private views are not permitted in the site.
.The site is used for collaboration and does not have any of the SharePoint publishing features enabled.
You need to enable users to filter the documents in the large document library by content type.
Which approach should you recommend?

A.
Activate the Metadata Navigation and Filtering feature. Modify the metadata navigation settings for the
document library by adding Content Type to the list of selected hierarchy fields.

B.
Create a new site scope for each content type. For each scope, add a rule of type Property Query. Set the
Property Restriction to include any item with the name of the content type of the scope.

C.
For each content type, create a new Web Part using the Content Query Web Part. Configure the Web Part to
filter the documents in the document library by that content type.

D.
Go to the site navigation page and enable the Tree View option. Use the Tree View option to filter the
documents in the document library.