For recipients, Dr. Jones should select a _____ because the message is ______.

The correct choice indicates that Dr. Jones should select a pool of recipients because the message is a request for any recipient to do something. In the context of communication within an electronic medical record system, a pool is used when the message being sent can be relevant to multiple individuals, each of whom may take action based on the request.

Using a pool allows Dr. Jones to efficiently reach a group of individuals who may need to respond to the same request. This is particularly useful when the action required isn't specific to any one individual but can apply to anyone within the designated group. It creates a bolder approach to ensure the request is seen by all who might have the capability to respond or act on the request, maximizing engagement with the message.

On the other hand, the other options suggest using a class or imply that the message is merely informational, which may not require action. Selecting a class might limit the message to a specific type of communication that may not adequately convey a call to action necessary for the scenario described in the question. Thus, identifying the need for a request among a broader group reinforces the selection of a pool as the appropriate recipient choice.