Read the sentence. elsa thought she was incapable of finishing the marathon, so she was delighted when she finally saw the finish line. how does the prefix "in-" in the word "incapable" clue the reader in to how elsa is feeling? it explains why elsa will not cross the finish line. it indicates why elsa has never tried a marathon before. it demonstrates why elsa is so relieved to see the finish line. it reveals why elsa has become such a confident competitor.