What is a possible outcome of international trade on market structures?

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A monopoly in the domestic market transforms into an oligopoly on the global stageAn oligopoly in the domestic market evolves into a global monopolyA perfectly competitive firm domestically turns into an oligopolist internationallyA perfectly competitive firm in the home market becomes a worldwide monopolist

Explanation

When trade expands beyond domestic borders, a monopoly confined to one country often faces competition from foreign firms, resulting in an oligopolistic market structure globally. Conversely, an oligopoly rarely consolidates into a monopoly worldwide. Similarly, firms operating under perfect competition domestically do not typically gain monopoly power internationally.