The correct answer is: C. Pali
Pali is a Middle Indo-Aryan language that was used as a vernacular language in the Magadha region of India during the Buddha’s lifetime. It is the language in which the Theravada Buddhist canon, the Tipitaka, was composed.
Sanskrit is an ancient language of India that is considered to be the sacred language of Hinduism and Buddhism. It is a member of the Indo-Aryan branch of the Indo-European language family.
Ardhamagadhi is a Middle Indo-Aryan language that was spoken in the Magadha region of India during the Buddha’s lifetime. It is the language in which the Mahayana Buddhist canon was composed.
Prakrit is a group of Middle Indo-Aryan languages that were spoken in India during the Buddha’s lifetime. It is the language in which the Jaina canon was composed.
Pali is a relatively conservative language, meaning that it has changed relatively little since it was first used to compose the Tipitaka. This makes it a valuable resource for linguists who study the development of the Indo-Aryan languages. Pali is also a living language, with a small number of speakers in Sri Lanka and Myanmar.