Jake has plans to go to an opera and already has a $100 nonrefundable, nonexchangeable, and nontransferable ticket. Now Latasha, whom Jake has wanted to date for a long time, asks him to a concert. Jake would prefer to go to the concert with Latasha and forgo the opera, but he doesn't want to waste the $100 he spent on the opera ticket. From the perspective of an economist, if Van decides to go to the party with Amy, what has he just done?a. Incorrectly allowed a sunk cost to influence his decisionb. Made a choice that was not optimalc Correctly ignored a sunk cost

Which of the following is true about presentation methods for providing training? audiovisual techniques are most effective when they are used alone. mobile technologies include training methods such as on-the-job training, simulations, business games and case studies, behavior modeling, interactive video, and web-based training that require the trainee to be actively involved in learning. the typical users for teleconferencing include employees who are part of a workforce that spends most of its time traveling, visiting customers or various company locations and has limited time available to spend in traditional training activities. webcasting involves classroom instructions that are provided online through live broadcasts. classroom instruction is no longer a popular training method because of new technologies such as interactive video and computer-assisted instruction.