What Was an Important Difference Between Daoism and Buddhism in China

What was an important difference between Daoism and Buddhism in China during the Six Dynasties period?

A) Daoism provided the Wei rulers with legitimacy, while Buddhism remained the official practice of the southern Han.
B) Daoism sought ways to prolong life, while Buddhism sought enlightenment through transcendental experiences.
C) Daoism taught a notion of karmic retribution, while Buddhists sought salvation through penance and ceremony.
D) Daoism attempted focus on reason, while Buddhism focused on the occult and magical.