38. What is one benefit of feeling angry? a. It provides a form of exercise for our heart and blood vessels. b. It prepares us for future occasions that we might feel angry. c. It serves as a signal that something is not right. d. It changes how our mind works. 39. In the selection, what is the meaning of the word "challenge?" a. It refers to a task that is new. b. It refers to a task that is different c. It refers to a task that is assigned to us. d. It refers to a task that is difficult to do. 40. In the selection, which trait would be most helpful when trying to use our anger in a positive way? a. being obedient b. being honest c. being thoughtful d. being hardworking