Getting better products and learning to share and cooperate and get useful resources
<span>C). Debris and other hazards
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The waterways had several falls and the rivers were swift. the journey was also very costly. however there were no remains and dirt as the rivers by then were clean, fresh and unpolluted.
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To prevent black african americans from voting after they were set free in the slave state (south)
China during the 1430s was the time of maritime explorations. The main reason for doing so is to trade with other countries. Zhu Di ordered for a great maritime explorations and left together with the fleet. The explorations were put on halt due to his death. The next emperor saw it as unnecessary and made a policy of Maritime Ban. Due to this policy the country was not able to trade and establish relationships with outside. The policy was lifted a few years after to regain trade functions but was later implemented again.
I think it would be A. The economy began to grow
