When Lincoln thought that the Emancipation Proclamation might be reversed, he supported the passage of d. the 13th Amendment.
The 13th Amendment formally abolished slavery in the United States of people who weren't incarcerated.
This was in line with the Emancipation Proclamation which Lincoln issued and so he supported this addition to the Constitution to ensure that slavery would remain abolished.
Find out more on the Emancipation Proclamation at https://brainly.com/question/12766031.
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