Why Is the Case of Emperor Shun and His Brother

Multiple Choice

Why is the case of Emperor Shun and his brother, Xiang, so important for Mencius' moral philosophy?

A) He had a duty to his brother even though he was not a Good person
B) They ruled because they had fully cultivated their moral "sprouts"
C) When Xiang died, Shun gave up the throne out of respect
D) Shun neglected his duties to care for his ill brother