Question

even though dr. phil could not recall the meaning of \semantic memory\ while in graduate school, he could correctly recall that the term appeared on the upper left side of a page in his textbook. this is odd because dr. phil made no conscious effort to remember the location of that information on the page.
his memory of the location of the term is best explained in terms of chunking.
his memory of the location of the term is best explained in terms of automatic processing.
his memory of the location of the term is best explained in terms of effortful processing.
his memory of the location of the term is best explained in terms of proactive interference.

Explanation:

Automatic processing occurs unconsciously. Since Dr. Phil remembered the location without conscious effort, it is best explained by automatic processing. Chunking involves organizing information into meaningful units, effortful processing is conscious, and proactive interference is when old information disrupts new - learning, none of which apply here.

Answer:

His memory of the location of the term is best explained in terms of automatic processing.