Ashoka the Great became emperor of India in 272 BC. He was the third emperor of the Mauryan Empire, which was one of the largest and most powerful empires in Indian history. Ashoka was a ruthless conqueror who expanded the Mauryan Empire to its greatest extent. However, after witnessing the carnage of the Kalinga War, he renounced violence and converted to Buddhism. He then embarked on a campaign of Buddhist evangelism and social reform. Ashoka’s reign was marked by peace, prosperity, and religious tolerance. He is considered one of the greatest rulers in Indian history.
Option A is incorrect because 336 BC is the year that Alexander the Great became king of Macedonia.
Option B is incorrect because 375 BC is the year that the Gupta Empire was founded.
Option C is correct because 279 BC is the year that Ashoka became emperor of India.
Option D is incorrect because 264 BC is the year that the Qin Dynasty was founded in China.