Which of the following accurately differentiates between work groups and work teams? a) work groups are used by top-management employees, while work teams are used by lower-level workers. b) work groups are used for functions relating to areas of the external environment, while work teams are exclusively used for departmental problems and issues. c) work groups involve members who have complementary skills, while work teams use employees who have random and varied skills. d) work teams generate a potential for an organization to generate greater outputs with no increase in inputs, while work groups cannot perform this function. e) work teams represent the mere accumulation of individual efforts, while work groups generate a positive synergy within the organization.