Which two statements are true about WSDL 1.1 and the Basic Profile? (Choose two.)
A. WSDL does NOT recommend a specific system for user-defined datatypes.
B. WSDL recommends the use of XML Schema for user-defined datatypes.
C. WSDL mandates the use of XML Schema for user-defined datatypes.
D. Basic Profile recommends the use of XML Schema for user-defined datatypes.
E. Basic Profile mandates the use of XML Schema for user-defined datatypes.
F. Basic Profile recommends the use of either XML Schema or DTD for user-defined datatypes.