What is the correct URL for a client to post an http message to the HTTP_AAE adapter of SAP Process Orchestration?

What is the correct URL for a client to post an http message to the HTTP_AAE adapter of SAP Process Orchestration?
A . http://<host>:<port> /sap/xi/adapter_plain?< query-string > < /query-string > </port> </host>
B. http:// < host >: < port > I HttpAdapter/HttpMessageServlet? < query – string > < / query – string > < v u /port > < / host >
C. http:// < host >: < port > I HttpAdapter/service? < query – string > < / query – string > < /port > < / host
D. http.// < host >: < port >/ sap/ http / sender? < query – string > < / query – string > < / port > < / host >

Answer: B