$1.$ Select the scenario in which a decision argument could be most helpful: A$.$ A commercial real estate executive is writing a memo about the strengths and weaknesses of the firm's marketing program. B$.$ The U$.$S$.$ postal service faces an uncertain future. A postal official addresses an in$-$house meeting about adapting the organization for the $21$st century. C$.$ A manager is presenting to a group of other senior technicians and product specialists. Her topic is the repeated failure of a part in one of the machines the company manufactures. $2.$ Which of the following questions is not used for organizing thinking about a communication? A$.$ What? B$.$ When? C$.$ How? D$.$ Who? $3.$ Which of the following is the function of an assumption? A$.$ It shows why the audience should believe the message. B$.$ It proves that the speaker or writer's conclusion is true. C$.$ It provides a logical link between different pieces of evidence. D$.$ It explains the meaning of the evidence. E$.$ It provides a logical connection between evidence and conclusion.