Which statement describes a component definition that is allowed by the EJB 3.0 specification?

Which statement describes a component definition that is allowed by the EJB 3.0 specification?

A.
A stateful session bean that is a Web service endpoint.

B.
A stateful session bean that has one remote business interface and is a Web service endpoint.

C.
A message-driven bean that has one message listener interface and is a Web service endpoint.

D.
A stateless session bean that has three local business interfaces and is a Web service
endpoint.