The correct option is C Sanskrit
The Gupta empire encouraged literature. Sanskrit language saw its revival during the Guptas. It had been recognised as the language of the courts and was widely used. Buddhist scholars, especially of the Mahayana sect, switched to Sanskrit. Jain scholars who normally used Prakrit and Pali also made the switch. The period saw the rise of many notable poets, dramatists, playwrights, and literary works.