Answer:
President Lincoln thought the Emancipation Proclamation could help the North win the war because it ended British and French support for the South.
Step-by-step explanation:
The Emancipation Proclamation was a declaration by President Abraham Lincoln that all slaves from those states opposing the Union are to be freed from January 1, 1863. But this does not include those slaves in the states who still support the Union nor does it actually free any slaves. Rather, it was more of a declaration with military objectives.
This Proclamation would then become the basis of which the Civil War was fought. But it also became a fight against slavery. And President Lincoln thought the declaration would help the North win the war because it ended the support from Britain and France.
Thus, the correct answer is the first option.