I dont really know that much about history but i will try my best to
help you
The answer is D. All of the above, as different changes in the environment can lead to many different things.
Answer:
I think it might be
Surrounding seas allowed people to set up ports for trade.
The location near the sea allowed people to interact with other civilizations.
A lack of flat land made people dependent on trade to survive.
Explanation:
Edit: dont listin to me im wrong im pretty sure
A. they became more expensive because they used technology