Which of the following statements is true about the lower classes in feudalism?

The statement that the lower classes in feudalism were allowed to use land under strict conditions is accurate. In the feudal system, the lower classes, often serfs or peasants, did not own the land they worked on. Instead, they were granted the right to use small plots of land that were owned by feudal lords. This arrangement typically required the peasants to provide labor, goods, or a portion of their crops to the lord in exchange for the privilege of using the land. The conditions of this agreement were often strict, regulating what the serfs could do, the amount of produce they had to give up, and their obligations to the landowner.

The other choices reflect misunderstandings of the feudal system's structure. Lower classes did not own land outright, nor could they sell land, as that was not their right. Furthermore, they certainly did not have complete autonomy over their land, as their activities and decisions were heavily controlled by the feudal lord's policies and demands.