A company named Contoso, Ltd. has a SharePoint 2010 site collection at www.contoso.com. You are
preparing to upgrade the site collection to SharePoint 2013.The root site collection has had extensive customizations made to pages by using SharePoint Designer.
You need to test the site collection customizations before the upgrade.
What should you do?

A.
Use the visual upgrade feature in preview mode.

B.
Use the page upgrade feature in preview mode for each customized page.

C.
Run the Get-SPSite -identity http://www.contoso.com | $_.GetVisualReport() | Format-Table
Windows PowerShell cmdlet.

D.
Request an upgrade evaluation site collection.