Which of the following statements about the progress of management theories is true? O a. The basic foundation for what we need to deliver products and services to the marketplace has changed significantly, although the tools we use to deliver products and services have remained static b. Although management theories have progressed, many of our most basic management principles are still in place O c. Generation Y employees are usually not comfortable with bringing new innovations to the corporate management environment O d. Companies should introduce new methodologies quickly and rid the organization of outdated theories of management for a completely new start