achieve this goal?

You are designing a SharePoint 2010 solution. The solution includes the rendering of a highly interactive control
that must allow the following functionality:
Fading items in and out.
.Dragging items around the display.
.Seamlessly updating information on the server without affecting other items on the page.
You need to design the interactive control according to these requirements. What are two possible ways to
achieve this goal? (Each correct answer presents a complete solution. Choose two.)

A.
Use cascading style sheets (CSS) to render the graphical enhancements.
Use AJAX to post the client-side information back to the server.

B.
Use client-side scripting to render the graphical enhancements.
Use AJAX to post the client-side information back to the server.

C.
Use Silver light to render the graphical enhancements.
Use Microsoft Windows Communication Foundation (WCF) to post the client-side information back to the server.

D.
Use a visual Web Part to render the graphical enhancements.
Raise custom events on the client side to post information back to the server.