What is the most important thing to include in a summary?

a. central idea
b. comparison
c. key information
d. author`s purpose

Choose the sentence that is not logically connected in the paragraph. (1) doctor henderson was a kind and gentle man. (2) his patients loved and respected him. his death made many of them sad. (3) as a young man, he decided to become a doctor and pursue a life of healing and comforting. (4) his work will long be remembered by the citizens of battle creek, michigan.