What significance does the case of Gitlow v. New York have for the history of civil rights in the U.S?

a. the case incorporated free speech in 1925
b. it served to incorporate the sixth amendment in the 1960's
c. The court rejected the incorporation of excessive bail in this case in the 1970's
d. In 1995, this case set the first limits to the concept of incorporation of the bill of rights

a. the case incorporated free speech in 1925