Why does interference explain why we sometimes seem to forget information that is, in fact, still stored in our memories?

a. Because although the capacity of our long-term memory is unlimited, the amount of information that can come in or out of that storage facility at any one moment is not unlimited.
b. Because the more we remember the more it fundamentally alters the structure of the hippocampus, causing some memories to be lost.
c. Because the memory system is easily confused by conflicting information, and thus we can only remember a specific amount before other facts become erased.
d. Because the passage of time causes facts to get "melted together," making individual units of memory difficult to retrieve.

Answer: A