The answer is B. The introductory text in the sentence cannot stand alone.
Thus, the introductory text in the sentence cannot stand alone explains best why the colon after "including” should be removed.
Answer:
The conflict in <u>The Outsiders</u> is between the Greasers and the Socs. The climax of The Outsiders is when Johnny kills the Soc. Johnny and Ponyboy run away. Later, the Greasers and Soc's have another rumble, and Johnny dies. I would say that this is the climax.