I’m not sure but i believe it is b) higher birth rates and death rates
Answer:
They created the blockade runner.
Explanation:
The blockade runner was invented to get past blockades. The South needed something fast that could get past the North's blockade so they could get supplies.
Hope This Helps :)
<span>Most of the nation expected Dewey to win instead of Truman.</span>
B because I just learned this in my World History class yesterday.
The US proved that it had the industrial strength and man power to become a world power
