Which kingdom, centred in present-day Cambodia, was the dominant power in mainland Southeast Asia during the 12th century?

• A Srivijaya
• B Khmer Empire ✓
• C Pagan
• D Champa

The Khmer Empire (Angkor) dominated much of mainland Southeast Asia from the 9th to 15th centuries, building extensive temple complexes across the region, including many in present-day Thailand.