Which of the following is a learning-curve model? A. the simple regression model and the multiple regression model B. the multicollinearity learning model and the goodness of fit learning model C. the account analysis learning model and the conference learning method model D. the cumulative average-time learning model and the incremental unit-time learning model

Fortress international, a large conglomerate, procures a few component parts from external suppliers and also manufactures some of the key raw materials in its own subsidiaries. aside from this, the company does not solely depend on outside distributors to reach its customers. in fact, it has its own retail stores to distribute its products. in this scenario, which of the following alternatives to vertical integration is fortress international applying? a. concentric integration b. taper integration c. horizontal integration d. conglomerate integration