<span>c. they trained british pilots in effective air support techniques.</span>
True without enough income the people who don't have enough money will be in poverty.
I believe the answer is Gold.
Gold was a very hot commodity at that time because before we use paper/digital money like today, Gold was made as material to make a type of money with more intrinsic value.
The abundance of this natural resources led to many European empire came and started their colonization in AFrica.
Like many Southeast Asian countries,
japan provided tributes to china to maintain an active trade relationship.<span />
