In "Perseus and the Quest for Medusa's Head," why is Perseus charged with the task of bringing the king the head of Medusa?

A.
Perseus suggests this task, and the king agrees to shame Perseus.

B.
The king wants to rid the kingdom of the evil villain.

C.
The king's daughter is angry with Medusa and asks Perseus to slay her.

D.
Perseus wants to marry a queen from across the sea, and this is the bride price.