Amekorietm0en4abar Amekorietm0en4abar 11-12-2015 Geography contestada The first civilizations in Asia formed along the _____ and ____ River valleys around _____ BC. a. Indus; Yangtze; 6000 b. Indus; Yellow; 3000 c. Indus; Yellow; 4500 d. Yangtze; Yellow; 2000