What makes a group of words a complete thought?

Could someone me with this question?

Why would the author show scout behaving like a lady lady during aunt alexandra's circle, even though she hates doing so? select all that apply. (to kill a mockingbird) to show her acceptance of that role in life to demonstrate empathy for aunt alexandra to reflect on scout's emotional confusion to show scout's growth and maturity

Sure, i wish things had turned out differently for me in vietnam. but i know things could have turned out worse, too. so ljust try to be for what i do have and do my best to be independent. i can dress myself and even tie a tie. no more playing guitar, though. if i close my eyes, i can just about hear the music. just strumming my heartstrings is what i'm doing, i suppose. how could the author best resolve this situation to create a feeling of somber regret? a. the narrator describes the difficulty in cooking for himself. b. the narrator decides to sell his guitar and take up a new instrument. c. the narrator points out that he doesn't have to wear a tie too often. d. the narrator mentions a friend who did not live through the war.