The main way in which advances in learning and technology influenced 15th and 16th century european exploration and trade is that the Renaissance Era in Europe brought back an interest in exploration of all kinds--from the sciences to the arts--meaning that people were interested in discovering known things and "worlds".
Bolshevik revolution, red scare, uprising of communism
The landmark case Plessey v. Ferguson was significant because "<span>It showed that racial segregation was constitutional</span>" since this remained the case until Brown vs. Board of Education overturned it.
The <span>Emancipation Proclamation ended slavery and set all slaves free.
It was signed on September 22nd, which was soon after the Union's victory against the Confederates in the Battle of </span><span>Antietam.
It was this victory that prompted President Lincoln to pass the </span>Emancipation Proclamation.
So the answer is A. S<span>eeing the Union’s effectiveness at the Battle of Antietam.</span>
