49. Which sentence is the appropriate "concluding sentence" for the following paragraph? A good friend should show some qualities. Being loyal is one of the best traits of a friend, because this implies that he or she will stand up for you. Being honest will create mutual understanding and get you through hard times. And most important of all, when a friend is willing to forgive you, he or she treats you as a treasure. _____(A) A kind of quality that a friend should not have is to cheat and steal. (B) When these important attitudes are shown, the friendship will continue. (C) Friendship cannot last long, but it creates unforgettable memories for everyone. (D) If you can get rid of the desire of competing with your friend, you will be successful.