The character who prevents a fight between the Pardoner and the Host is the Knight. Option B is correct.
At the end of the Pardoner’s Tale, the Knight attempted to stop the squabbling between the Host and the Pardoner, making them kiss and make up.
"The Pardoner's Tale" is one of The Canterbury Tales written by Geoffrey Chaucer.
This character is romantic as well as idealistic and avoid any sort of conflict or unhappiness.