19. The following question has two parts. Answer Part A first, and then Part B. Part A Which sentence from the passage best states the main idea? a. Hiking the Appalachiar Trail is a difficult but memorable experience. b. Everyone I know who has done it recalls the experience even if he or she did it decades ago. C. Last summer, my brother,, a few of my friends,and I decided to give it a try. d. My credo is "If you think you can do it, then do it!" Part B Which sentences from the passage best support the main idea identified in Part A? a. sentences 2 and 14 b. sentences 3 and 8 C. sentences 3 and 10 d. sentences 6 and 11 20. The words credo and incredible, which are underlined in the passage feature the Latin root-cred-. Using your knowledge of the root-cred- and the context of the passage, choose the best definitions of the words. a. Credo means "camping supplies." Incredible means "opposed to camping." b. Credo means "guiding belief." Incredible means "unable to be believed." C. Credo means "favorite saying." Incredible means "unable to be said d. Credo means "true description." Incredible means "unable to be described." 1. As what part of speech does the infinitive phrase in sentence 9 function? a. noun b. verb C. adjective d. adverb Which word from the passage contains a prefix meaning "not"? a. experience (sentence 1) b. decided (sentence 3) C. dislikes (sentence 8) d. continued (sentence 10)