What was key to the supreme court's argument in the verdict of the 1896 plessy v. ferguson case?
a.
equal protection under the law

b.
the doctrine of separate but equal

c.
the collapse of reconstruction governments

d.
the constitutionality of voting for all citizens

B.

the doctrine of separate but equal

Explanation:

Plessy v. Ferguson (1896) - a decision of the US Supreme Court, legally formalizing racial segregation and confirming its compliance with the American constitution. This decision reinforced the phenomenon of racial segregation in the United States. Several states have passed laws that establish segregation in schools, hotels, restaurants, hospitals, transportation, and toilets. There were two Bibles in the courts, one of which was intended to take the oath of allegiance to blacks. The doctrine is known as "separate but equal."

both the house and senate must approve the conference report.   after it is approved by both on an identical from, it will be sent to the president.   if the president approves it, it will become law.