How did trade early africans develop advanced societies?

a.
it introduced them to new religions.

b.
it allowed them to make weapons out of iron.

c.
it made the gold they mined more valuable.

d.
it allowed them to trade natural resources for items they needed.

In 100,000 years, the rotation of earth will be slower by how many seconds?

Which sentences describes a cycle of dependency? a. aid harms the local economy creating the need for more aid.b. aid improves infrastructure and creates more wealth and more good infrastructure.c. aid programs become more reliable over time so people can depend on them.d. no answer is correct

In 1917 ww1 started to happen, and america tried to stay neutral but couldn't. what are the two main reasons america didn't stay neutral during ww1