During WWII Germany used the tactic of attack called the blitzkrieg and it is where they used large amounts of fast tanks and aircraft to invade countries quickly and surprise the enemies, the downside was that this used up a lot of gasoline very quickly.
In what year? There were many years where nothing was in common at all and now there is most everything in common
D. Remained poor.
They experienced a period of economic stagnation following the independence. Making a lot of people remained poor despite being free from the European colonization. They need some time before they eventually make adjustments to implement a proper political system in place and develop their economy.