प्रयाग प्रशस्ति के अनुसार, समुद्रगुप्त ने किस श्रेणी के राज्यों के प्रति 'कन्योपायन' (पुत्रियों का विवाह में उपहार देना) की नीति का पालन किया था?

Gautama Buddha was born at ______.

Consider the following statements regarding a historical period: (i) Animals began to be used for transporting goods during this period. (ii) Trade and transportation developed significantly in this era. (iii) Pottery making using the potter's wheel started in this age. Which historical period is described by the above statements?