How is the concept of Lincoln garnering support for the Emancipation Proclamation developed throughout the passage?

A. Lincoln wanted to support the Union troops by giving them a cause to rally around, so he wrote the Emancipation Proclamation.

B. Lincoln wished to support freedom for all men and women right away but could not gather enough of it to pass the Emancipation Proclamation.

C. Lincoln realized that Europe was going to support the Confederate Army and wrote the Emancipation Proclamation to discourage them from doing so.

D. Lincoln decided to bide his time and introduce the Emancipation Proclamation as a strategic military move, gradually gaining support for it over the course of the Civil War.