Which statement is true? A. The West African savannah produced oil palms in great quantities.
B. There was no agriculture in the African rain forest.
C. Ethiopia had no agriculture until it was colonized.
D. The Niger River was important for the development of rice
farming

question as stated in comment

why did the chinese require the portuguese to pay for goods in gold and silver when trading?

choices

portuguese goods were less valuable than chinese goods.

the chinese already had a surplus of portuguese goods.

the imperial government wanted to stockpile gold and silver.

portuguese and chinese currencies were not exchangeable.

this a history q n in ancient time, theres no money exchange. so ans is portuguese and chinese currencies were not exchangeable.