The correct answer is B) Hinduism.
The religion that considers the epic poem about Krishna one of the most important texts is Hinduism.
Hinduism is the religion that has the most followers in India. Hinduist follow the teachings of the Vedas and believe that "Truth" is eternal and represents the essence of the Universe. They have the concept of Brahman, which represents an eternal and loving God. They also have the precept of Dharma, which can be translated into English such as conducting oneself in the right way, always.