The message is sent to the input queue of a message flow that contains a . . . . . . . .

subscriber
server
publication node
client

The correct answer is: A. subscriber

A subscriber is a component that receives messages from a message flow. A message flow is a logical grouping of components that exchange messages. The input queue of a message flow is a queue that stores messages that are sent to the message flow.

The other options are incorrect because:

  • A server is a component that provides services to other components.
  • A publication node is a component that publishes messages to a message flow.
  • A client is a component that consumes messages from a message flow.