Chola (A) and
through trade networks (A) are correct answers.
The rulers of the Chola empire in southern India spoke Tamil. Indian cultural ideas and practices spread from the empire mainly through trade networks.
Chola rulers ruled over Tamil Nadu and other parts of south India from 300s BCE–1279 CE. They had Tamil and Sanskrit as their official languages. They had trade relations with China and Southeast Asia which lead to the spread of Indian cultural ideas and practices.