Answer:
A
Explanation:
The Plessy v. Ferguson supreme court case of 1896. This stated that there can be seperation, however, everybody must have equality in what they get. This however, resulted in African Americans and other minorities getting "less rights" than the White Americans. This led to state-sponsored segregations
African Americans risked their lives for there country
Although opportunity cost is definitely important, it is hard to put a "price" on the opportunity in many cases, which makes it unmeasurable. This is why economists focus almost exclusively on price.
Syria, In 2011 a revolution involving many deaths and killings while the leader tried to stay in power.
