The correct options are
A The overthrowing of the Pallavas
C Establishment of Tanjavur as the capital
D Significant naval conquests and naval capabilities
Vijayalaya created the Imperial Chola Empire in the 7th century CE. It is said that the Cholas were once feudatories of the Pallavas, but rose to power when the Pallava power weakened. The real victory for Vijayalaya was when he conquered Tanjavur and established it as the capital of the medieval Chola Empire. The Chola king, Aditya I, established the Cholas as the main power in the Tamil Nadu region by finishing off the remaining Pallava power. The Chola Empire was perhaps the greatest naval empire of medieval India.