Why does Baloo say, "A man's cub is a man's cub, and he must learn all the Law of the Jungle"?

A. because Mowgli would only appreciate the jungle if he learned the Law of the Jungle well

B. because Mowgli would not be able to gain the trust and love of other animals if he did not learn the Law of the Jungle first

C. because even though Mowgli had lived in the jungle, being a human, he did not know when to use the Law of the Jungle

D. because a man's cub must learn the Law of the Jungle before growing up