C. Thesaurus
Dictionary's are used to find the definitions of words.
Spell check is used to correct incorrect spelling
Wikipedia is used to learn about the meanings and backgrounds of things
Scout characterizes Boo as a petty criminal and a "malevolent phantom." Jem describes his neighbor as a monstrous figure, six-and-a-half feet tall with bloodstained hands. Dill must imagine Boo based on the descriptions his friends provide him.
Should be 5 ? none of the others make sense