Managers are a critical part of any successful organization because A. they are willing to make sacrifices to nurture employees and work with them to accomplish the organization's goals, often at the expense of their own career goals B. they often have degrees and a formal education, which generally makes them better leaders than other employees C. they are generally good at leading by example D. they use their skills and knowledge to move the organization forward towards established goals E. they are most familiar with the organization, what it does, and the products or services it supplies to customers