Final answer:
In the medieval social hierarchy, noble lords and ladies ranked immediately above knights, who were vassals that pledged military service for land, and were in turn above the serfs, who were the lowest class bound to the land. option A is correct
Step-by-step explanation:
In the medieval hierarchy, the noble lords and ladies were immediately above the knights. The medieval society was highly stratified, with each level having distinct roles and levels of power. Lords and ladies were part of the ruling class that owned land and had vassals serving them.
These vassals, often knights, were granted pieces of land, or fiefs, and in return, they promised to provide military service to their lords, effectively making them lesser in hierarchy compared to the nobility.
The knights were above the serfs, who were the laborers tied to the land, forming the lowest rung in this social structure. The serfs were bound to serve and provide for the lords, and unlike knights, they had very few rights and could suffer physical abuse at the hands of their lords. option A is correct