Answer:
D
Explanation:
using more public transportation would make us use more oil instead of cutting back, because of gasoline
The period saw major technological advances, including the adoption of gunpowder, the invention of vertical windmills, spectacles, mechanical clocks, and greatly improved water mills, building techniques (Gothic architecture, medieval castles), and agriculture in general (three-field crop rotation)
In 1939 Japan had control over Korea, Taiwan and Manchuria (Northern China). They had declared war on mainland China to gain more territory and resources.