An existing Web 2.0 application has several Ajax functions and an effective interface. It calls server
side logic using XMLHttpRequest to pass and receive XML messages. When would using JSON
messages on all Web 2.0 applications dramatically improve the performance of the application?

A.
when the application servlets are able to process the requests more efficiently and better
integrate with the backend systems

B.
when the existing Ajax functions pass large XML messages, and using JSON will reduce the size of
the messages

C.
when the browser’s HTML renderer is able to display the results much clearer when information is
conveyed using JSON

D.
when the application uses a web service call using JSON between the web page and backend,
then the web service will be able to use Web Service Security