Consider the following statements about the composition and evolution of the Mahabharata:
1. It was first composed orally by charioteer-bards and later written down by Brahmanas.
2. The Bhagavad Gita, a key didactic section, was likely added between 200 BCE–200 CE.
3. The final form of the Mahabharata was fixed around 200 BCE.
4. The text reflects both social change and religious evolution.