Dr. Ramscar's research was based on:

According to Dr. Ramscar, why do our brains "slow down" as we get older? <p></p>

According to Dr. Ramscar, why do our brains "slow down" as we get older? A: Our ability to process new and old information declines B: Our brains go into steady decline C: We have more information, so it takes longer to process it D: Older brains are more forgetful than younger brains are