In chapter 21 of to kill a mockingbird, the author best reveals the intensity of jem's belief that the jury will find the defendant, tom robinson, not guilty by a. enumerating jem's understanding of the legal definitions of the crimeb. describing jem's actions, including that he was jumping in excitementc. reflecting jem's optimism by his repetition of positive, enthusiastic responsesd. showcasing jem's ability to form an argument similar to his father, atticus