which had the biggest impact on economic growth in sumerian city - states?\nwriting literature\nbuilding…

which had the biggest impact on economic growth in sumerian city - states?\nwriting literature\nbuilding ziggurats\ntrading between city - states\nprotecting the city - state from invaders
Answer
Brief Explanations:
Trading between city - states facilitated the exchange of goods and resources, which is fundamental for economic growth. Literature is more cultural, ziggurats are religious structures, and protection from invaders is more about security than direct economic growth.
Answer:
C. trading between city - states