Please help ill give <333 and don't put any link up or else ill report you !!! the quote below by Lincoln is discussing which topic?

'That on the first day of January. All person held as slaves within any state or designated part of a state, the people whereof shall then be in rebellion against the United States, shall be then, thenceforward, and forever free and the Executive Government of the United States, Including the military and naval authority thereof, will recognize and maintain the freedom of such persons.

A ) Session
B ) Cession
C ) Emancipation
D ) Reconstruction