In 2010, Apple Inc. acquired the SRI International Artificial Intelligence Center, which itself was a joint collaboration between the French Vrai Group and the Ecole Polytechnique Fdrale de Lausanne. The collaboration had resulted in Siri, an artificially intelligent personal assistant which Apple was using for its products. This acquisition is an example of a(n) _________________. Group of answer choices upstream vertical intergraton equity joint venture downstream vertical integration horizonal integration