单项选择题

Some people say that seals are the fairies of the sea and should not be killed. The seals are the cleverest creatures that have ever been found in the sea.
"In the Kingdom of the Seals" is an English fairy story by Donald A. Mackenzie. It tells of a seal hunter who wounds a seal. The seal swims away with the hunter’ s knife still in its back. That evening a stranger on a black horse calls at the home of the seal hunter and takes him to the edge of a cliff. Suddenly the seal hunter finds himself falling. He falls to the bottom of the sea.
The stranger Changes into a seal and leads him towards a huge underwater palace. Inside the palace he sees an old grey seal lying on a bed in terrible pain. Beside the bed is a knife which the hunter recognizes as his own. He is ashamed of his cruelty and begs forgiveness of the old seal. Because this is a fairy story, the wound is healed when the seal hunter lays his hand on it and wishes. The old seal regains his strength straight away. The seal hunter promises never to hunt seals again, Then he is led back to dry land. When he gets home he finds his pockets are filled with pearls.

The seal hunter begs forgiveness of the old seal because()

A.he is sorry to have wounded the old seal
B.he is afraid that the seals would kill him
C.he knows that the old seal is the king in the kingdom of the seals
D.the seals give him many pearls