The correct answer is C. Pali.
Pali is an Indo-Aryan language that was spoken in the Indian subcontinent during the time of the Buddha. It is the language of the Theravada Buddhist canon, and is still used in Buddhist ceremonies and rituals today.
Hindi is an Indo-Aryan language that is spoken in India, Pakistan, and Nepal. It is the official language of India and is the most widely spoken language in the world.
Urdu is an Indo-Aryan language that is spoken in India, Pakistan, and Bangladesh. It is the official language of Pakistan and is the second most widely spoken language in India.
Hebrew is a Semitic language that is spoken in Israel. It is the official language of Israel and is the liturgical language of Judaism.
Pali is a more ancient language than Hindi, Urdu, and Hebrew. It is also a more conservative language, meaning that it has changed less over time. This makes it a better choice for preserving the teachings of the Buddha.
Hindi, Urdu, and Hebrew are all more recent languages. They have also changed more over time. This makes them less suitable for preserving the teachings of the Buddha.