What was the importance of plessy v. ferguson?

The supreme court ruled that seperate facilities for blacks and whites were legal, as long as they were of equal quality.  This "seperate but equal" standard, however, was not upheld, and black facilities were frequently much shabier.  Also, although some found it fair, the decision to seperate any group of people based on their race contributed greatly to the growing mentality of segregation and racism in the country.  

harding's opponent in the 1920 election was ohio governor and newspaperman james m. cox, who had won the democratic nomination in a 44-ballot convention battle. harding rejected the progressive ideology of the wilson administration in favor of the laissez-faire approach of the mckinley administration.

answer: d. an organization that fought for women's voting rights