According to C. K. Prahalad and G. Hamel, which of the following is true of the core competencies of companies? Multiple choice question. The ability of managers to focus on value creation is adversely affected if they view the business as a portfolio of core competencies. A firm has identified its true core competencies if it has compiled a list of 20 to 30 capabilities. Few companies are likely to be leaders in more than five or six core competencies. Managers can focus primarily on cost cutting and opportunistic expansion by viewing the business as a portfolio of core competencies