Sony, Microsoft, and Nintendo Have in Common That

Sony, Microsoft, and Nintendo have in common that

A) each achieved a dominant position in its industry because it owned a key input in the production of its product.
B) the industry in which each firm competes is an oligopoly because of government-imposed barriers to entry.
C) each company was founded in the same state.
D) the profitability of each firm depends on its interactions with other firms.