The words and punctuation that best corrects any errors in the sentence is option A. well-known. The word well-known should have the punctuation mark hyphen because it is a compound word. Compound words are words that consist of two or more words linked together by a hyphen, in order to create a new word with a new meaning. The word "well-known" means famous.
Generally, just a biography, an autobiography is a biography written by the person about themselves :)
C. He is dissatisfied and feels disillusioned with his surroundings.
Go home because if you are made immortal, you will keep making the same mistakes for all of eternity. You will watch your family and friends pass on, and you cannot be or go with them. At least going home makes the time you have with them all the more precious.
Hope this helps!