The correct answer for the first gap is "A) Chola".
The Chola empire was one of the longest dynasties in world history, lasting more than 1500 years (from 300 BCE to 1279 CE). Its official languages were Tamil and Sanskrit.
The correct answer for the second gap is "A) Through trade networks".
With the conquest of Kadaram and Srivijaya, the Cholas established important commercial routes with the Chines Empire. This enabled them to influence local cultures along the way. This is why there are examples of Hindu cultural influence throughout all Southeast Asia.
I think the that policy would fall under imperialism because anti-imperialism was against expansion.
He was a commodore in the United States Navy who, in 1846, claimed California for the United States.
Even O'Sullivan himself talked about Manifest Destiny in broad terms before he coined that particular phrase: "The expansive future is our arena," he wrote in 1839.