In the context of the Old Testament sacrificial system, what is the primary distinction between a sin offering (khatat) and a guilt offering (asham)?

A A sin offering was for unintentional sins, while a guilt offering was for intentional sins. B A sin offering was primarily for purification, while a guilt offering involved restitution for offenses against God or man. C A sin offering was offered only by priests, while a guilt offering was offered by any Israelite. D A sin offering involved only animals, while a guilt offering could involve grain.