Travis,who Is 25 Years Old,knows That Beijing Is the Capital

Travis,who is 25 years old,knows that Beijing is the capital of China,but he cannot remember when or where he learned this.This is an example of how:

A) semantic memory improves with age.
B) semantic memory is closely linked to an individual's personal identity with the past.
C) semantic memory begins to decline in early adulthood.
D) semantic memory is independent of an individual's personal identity with the past.