I think it is A for they formed a group to fight the whites.

Tsar Alexander II initiated a series of importantreforms in Russia. During his reign, the country's rail and communication networks were improved, resulting in increased economic activity and the development of banking institutions.
the person that became president was Calvin Coolidge
Answer:
The correct answer is:
d. Lincoln thinks the civil war will be of outstanding significance or importance.
Lincoln refers to the American Civil War (1861 - 1865), which confronted the Union and Confederate Armies. And the Battle of Gettysburg, which had taken place a few months before Lincoln delivered his Gettysburg Address, is recognized as a turning point in the war in favor of the Union cause.
Explanation: