19. Based on the Build-Borrow-Buy framework, when should equity alliances be considered as a growth option? a. When the resource in question is highly tradable b. Before the strategist has considered building the necessary resources in house c. After it has been established that the firm can integrate the partners operations with its own with relative ease. d. When the resource in question is low in tradability and a high degree of closeness to the resource partner is necessary to exchange and integrate resource on a continued basis