In the speech written in the Gettysburg Address Lincoln was defending civil rights. He was equally defending freedom and dedicated his speech to all the soldiers who lost their lives defending freedom and their beliefs. Lincoln also mentioned fundamental American rights, such as the United States being a country "by the people and for the people." His speech is one of the best known speeches in American history and marked one of the end points of the Civil War and the defeat of the Confederate Army by the Union Army.
D.) taking a diplomatic or legislative action to force the European powers to negotiate with the United States
One of the major long term effects of the recognition of Christianity in Constantinople was that Christians were no longer persecuted, which led to Christianity becoming a major religion in Europe.