Assuming the developer is correct, choose the sentence that best describes an attempt to introduce this ability as this developer suggests (Choose one):

An airline built and deployed a back-end application to manage reservations. To support interoperability with as large a base of standalone client applications as possible, the services provided by this back-end application are exposed as XML-based restful web services. Management just added a new requirement that AJAX-based web application clients be supported, too. One of the developers suggested that it is enough to extend the existing application to support both XML-based and JSON-based restful web services. Assuming the developer is correct, choose the sentence that best describes an attempt to introduce this ability as this developer suggests (Choose one):

A.
The attempt will fail, because JAX-RS does not support both XML- and JSON- based restful services in parallel.

B.
The attempt will be trivial to implement, since JAX-RS just needs for the application to specify that both XML- and JSON-based interaction will be supported.

C.
The attempt can succeed, but it will require a significant amount of new code, since JAX-RS does support both XML- and JSON-based interaction – but not single resource can support both kinds of interaction simultaneously.

D.
The attempt will fail, because there is more to the difference between XML-based and JSON- based interactions than just the data representation used.