Which of the following corporate governance structures is most common around the world?

The single-tier board system (Option B) is the most common governance structure globally, particularly in the United States, the United Kingdom, and many Commonwealth countries. In this system, executive and non-executive directors sit on the same board, overseeing management and strategic decisions.

Joint auditors (Option A) are primarily used in France and India for financial oversight but are not a standard governance structure.

Cumulative voting (Option C), which allows minority shareholders to have a greater voice in board elections, is common in some jurisdictions (e.g., the U.S. for shareholder rights protection) but is not a universal governance structure.