D) When his daughter is married, the king will bestow upon her many riches.
Explanation:
The word Bestow is used to express the fact that someone is being granted something, for example when someone gets a gift it is said that someone its bestowed upon him or her, from the options the only one that uses the word bestowed in the correct way with the meaning of the word is the optionD) When his daughter is married, the king will bestow upon her many riches.