Which public toolkits are supported by the Web Add-in Extensibility feature?

Which public toolkits are supported by the Web Add-in Extensibility feature? (Select four.)

A.
ASP.NET AJAX

B.
FOX

C.
SUN JWDK

D.
Motif

E.
Google Web Toolkit

F.
YahooUI

G.
Dojo

H.
COM.NET AJAX

Explanation: