Which two statements are true about SOAP encoding? (Choose two.)
A. SOAP encoding can describe sparse arrays.
B. The soapenc:encodingStyle attribute must be specified on the soapenv:Body element.
C. SOAP-encoded messages can be used to represent graphs of objects.
D. The oapenc:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" attribute is valid on a soapenv:Envelope in a WS-I Basic Profile 1.1 conformant SOAP message.