The answer should be A, "Communism promised jobs after the insecurities of war." Hope this helps!
Answer: In Medieval Europe, knights pledged loyalty to vassals, who in turn pledged theirs to powerful lords, and serfs labored in the fields.
Explanation:
A rigid hierarchy refers to one where people who are born into a certain position in life, find it quite hard to move from it or rather one where there are different social classes and people had to be classified in one class for the system to work.
The system during medieval times was much like this. Social classes existed that determined a person's worth in society such as the knights, vassals, Lords and Royals. There was also the serfs who were considered the lowest in the hierarchy.
There is a strong link between increased levels of education for females and lower fertility rates. That is, the higher the level of a woman's educational attainment, the fewer number of children she is likely to bear, and this effect is shown in countries and cultures around the world.
