5. "Such findings challenge long-held beliefs about intelligence and aging."
It was once believed that IQ remained fixed throughout life, but studies have shown that it can improve with mental training.
(A) People who engage in complex tasks tend to see increases in their IQ, while those with less demanding work may experience decline.
(B) Similarly, the brain does not necessarily weaken with age.
(C) In fact, older adults can strengthen their mental abilities through activities such as reading and learning new skills.
(D) Many misconceptions arise from a lack of understanding.
(E) Therefore, we should remain open to new knowledge as scientific discoveries continue to evolve.