Which cause and effect relationship is correctly matched?
a. communists rule north korean-china and the soviet union back north korea
b. fidel castro assumes power in cuba-the u. s. backs the castro regime c)the mujahedeen rise in afghanistan-the soviets back the mujahedeen d)the sandinistas take power in nicaragua-the u. s. backs the sandinistas

2686-2181 bce-- "egyptian civilization developed along the nile river in large part because the river’s annual flooding ensured reliable, rich soil for growing crops."

1069-664 bce-- "ancient egyptians developed wide-reaching trade networks along the nile, in the red sea, and in the near east."

4 copper and gold, the california gold rush is why im pretty sure.