Your application produces messages by client applications. The number of clients interested in the messages varies continuously at run time. Any client can process any message, but a message must be processed exactly once.
How should the messages be delivered to the clients?
A. Using a Java Message Service (JMS) topic
B. Using a Java Message Service (JMS) queue
C. Using XML over HTTP
D. Using a Simple Object Access Protocol (SOAP) web service
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