What is the name of the mountain range that runs along the Thailand-Myanmar border and is the source of the Khwae River?

• A Bilauktaung Range
• B Thanon Thong Chai
• C Dawna Range ✓
• D Phetchabun Mountains

The Dawna Range forms a section of the Thailand-Myanmar border, containing several major wildlife sanctuaries including Thung Yai Naresuan, a UNESCO World Heritage site.