Answer:
Implicit
Explanation:
An implicit message refers to such form of communication wherein the required course of action is implied and not expressly or explicitly conveyed. Such messages include a hidden but obvious idea or fact.
Such messages do not clearly convey what is exactly intended but rely on assumption of the receiver's right comprehension.
In the given case, Rafaela asked her assistant to complete a report as soon as possible. The assistant on the other hand took such directions as of routine course and acted casually w.r.t performing the task.
This represents an implied message of the urgency of the task since Rafaela used "as soon as possible.". What it could not state expressly being, the extent or magnitude of urgency. The message wasn't clear with respect to the time period within which the work was to be performed.
Thus, the implicit aspect of Rafaela's message wasn't understood by her assistant.