Douglass wrote about his meeting with Lincoln almost 20 years
later. How might the passage of time affect Douglass’s memory of
Lincoln and his evaluation of the Emancipation Proclamation?

Because of the long time between the two events, there would be possibility of error in exact words and perception of its meaning.

Explanation:

After the twenty long years Douglass might not have a clear picture of what Lincoln had said. There is a high possibility that after this much long time he may have subconsciously or unconsciously modified what Lincoln had said a little to be what he wanted to hear. It is really difficult to recall the same words or meaning from an event, after twenty years of the event actually occurred.

i just did something on this guy a few days a go give me two minutes to find it in my notes.

the real answer is b