What treaty, signed in 1855, opened Siam to free trade with the West and granted extraterritoriality to British subjects?

• A Bowring Treaty ✓
• B Treaty of Nanking
• C Burney Treaty
• D Anglo-Siamese Treaty of 1909

The Bowring Treaty between Siam and Britain, negotiated by Sir John Bowring, eliminated royal trade monopolies and set a model for subsequent unequal treaties with other Western powers.