How does the groom's interaction with the blacksmith in "for want of a horseshoe nail" best affect king richard?

the groom's impatience with the blacksmith to make more nails causes the horse to lose its shoes.

the horse's shoes are not nailed on firmly enough, causing the horse to throw king richard after it stumbles.

king richard calls for a new horse after he falls off his, but his men run off the battlefield, leaving him behind.

king richard loses the battle against henry when the king is thrown from his horse after the horse loses its shoes.