20. (A) alive (B) rest (C) slow (D) active

25. According to the passage, optimism _____. (A) is much better if it’s natural, but there are some benefits to learning optimism (B) is generally found only in people who are quite healthy or generally happy (C) cannot be changed naturally and requires major surgery and months of recovery (D) has certain health benefits whether it’s natural optimism or learned optimism