When Liz asks her father if he minds her borrowing the car, she notices he frowns and shakes his head. What is Liz observing in her father?

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Biff wants the members of the administration in the audience to change their minds about the +/- grade system that was implemented at the university last semester. Biff will be giving which type of presentation?

a. Presentation to actuate b. How-to demonstration c. Presentation to convince d. Expository presentation