The correct answer is C. Tripitaka.
The Tripitaka is the sacred canon of Buddhism. It is a collection of texts that contain the teachings of the Buddha. The Tripitaka is divided into three parts: the Vinaya Pitaka, the Sutta Pitaka, and the Abhidharma Pitaka.
The Vinaya Pitaka contains the rules and regulations for the monastic order. The Sutta Pitaka contains the discourses of the Buddha. The Abhidharma Pitaka contains the philosophical teachings of the Buddha.
The Tripitaka is the most important text in Buddhism. It is the source of all Buddhist teachings. It is the foundation of Buddhist practice.
The Upanishads are a collection of Hindu texts that contain philosophical and religious teachings. The Vedas are a collection of Hindu texts that contain hymns, rituals, and other religious texts. The Jatakas are a collection of Buddhist stories about the Buddha’s previous lives.
The Upanishads are not sacred texts for Buddhists. The Vedas are not sacred texts for Buddhists. The Jatakas are not sacred texts for Buddhists.
The Tripitaka is the only sacred text for Buddhists.