Churchill-Perez International is a large conglomerate that procures a few component parts from external suppliers; it also owns subsidiaries that manufacture key raw materials. The firm does not solely depend on outside distributors to reach its customers. In fact, it has retail stores in the United States, Canada, and the United Kingdom that feature its products. In this scenario, which of the following alternatives to vertical integration is Churchill-Perez applying? concentric integration taper integration horizontal integration conglomerate integration