Answer:
Explanation: During the 11th century, however, feudal life began to change. Agricultural innovations such as the heavy plow and three-field crop rotation made farming more efficient and productive, so fewer farm workers were needed–but thanks to the expanded and improved food supply, the population grew.
<span> e. they may have been able to walk upright on two legs
</span>The most significant about australopithecines, one of the earliest hominids os that they may have been able to walk upright on two legs- They lived in Africa and had many behaviors similar to nowadays apes. the ability to walk on two legs is important because it frees the hands to do other stuff like gather food or use instruments.
B. Night of Broken Glass is correct.
