Answer:
Iron Production
Explanation:
With Iron, they were able to make a mass production of weapons.Alot of weapons being made way quicker then before really Helped the Han Dynasty. They were able to supply all their soldiers with weapons and armor too. This had a positive impact when they were in wars. Therefore, I think iron had the greatest impact on the Han Dynasty
Researchers in life-span development have a special concern with studies that focus on the relation of age to some other variable.
<h3>What is meant by lifespan development?</h3>
This has to do with the study that is focused on the ways that people would grow and also change during the course of their lives. This is the type of study that would be involved in the patterns of growth experienced and the ways that people would change over the course of their lives.
Hence we can say that researchers in life-span development have a special concern with studies that focus on the relation of age to some other variable.
Read more about life-span development here: brainly.com/question/8335007
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Answer:
c. property tax and sale tax
Explanation:
A a system where power is shared