Atrainer arranged for one of her employee training groups to see the video made from the book effective time management, while all her other training groups read the book without seeing the video. she wanted to know whether videos could be used as effective aids in teaching time management. she tested each group for knowledge and ability to apply the concepts covered after each type of instruction. on all tests, the group that saw the video did better. this group became so interested in effective time management that most individuals in the group chose to read the book, for the first time, entirely on their own initiative. there was no evidence that the training group that saw the video understood or appreciated effective time management more than the training group that read the book without seeing the video. a. trueb. probably truec. insufficient datad. probably falsee. false