Place the following events in chronological order a. Fort Sumter is fired upon
b. Lincoln is assassinated
c. Lee surrenders to Grant at
Appomattox Court House
d. Slaves in Texas are freed
e. Battle of Galveston protects the
Confederate ports in the Gulf of
Mexico

I believe the answer is: B. when demand is greater than supply

When demand is greater than supply, the commodities demanded would become 'rare' in the market.

This mean that because of the rarity, more people would be willing to make more economic sacrifice to obtain the product, which lead to an increase in price.