Which method should you choose?

You are creating an ASP.NET application by using the .NET Framework 3.5. The application will allow end users to select a theme that will be applied to all the pages that the user visits. The preferred theme of the end user will be stored in a profile property. You need to identify the appropriate method to apply the preferred theme to the page. Which method should you choose?

A.
The page constructor

B.
The handler for the Page.Load event

C.
The handler for the Page.PreInit event

D.
The handler for the Page.Render event