After having seen many pictures of the Lincoln Monument during his lifetime,Mr.Adams mistakenly recalled that he had actually visited the site.This best illustrates

A) source amnesia.
B) proactive interference.
C) implicit memory.
D) positive transfer.

Mr. Adams mistakenly recalled a memory that was not actually his own, which is an example of source amnesia. Proactive interference refers to when old memories interfere with the retrieval of new memories, and there is no indication of this happening in the scenario given. Implicit memory refers to memories that are unconsciously retrieved and used to perform tasks without conscious awareness, which is also not applicable here. Positive transfer refers to when knowledge or skills from previous learning applies to new learning, and there is no indication of this happening in the scenario given.