Answer & ExplanationAnswer: [D]
The kingdom in the later Vedic period became much larger than in the early Vedic period. Ashvamedha (horse sacrifices) were performed and the ideal of setting up empires gained popularity with the kings. It may be noted that no real conquest was really made and tribes like Kuru, Panchalas, Kosalas and Videhas were never amalgamated into a single tribe.