Plan an adaptive UI layout

You are modifying an existing ASP.NET MVC web application to incorporate mobile access. What should you do to ensure that mobile devices view mobile-only pages? (Choose all that apply)

Create additional views with .Mobile, such as Index.Mobile.cshtml.
Create additional views with .Mobile, such as Index.Mobile.cshtml as well as a _Layout.Mobile.cshtml master layout page.
Run the Install-Package jQuery.Mobile.MVC command using the Package Manager console.
Create a _Layout.Mobile.cshtml master layout page.