The man or central idea refers to the most importan idea in a paragraph, text, or work of art. As stated in the question, the main idea expressed by the narrator is that he was meant to have a career in medicine. Option B states that <em>The first step was supposed to have been attending my parents alma mater, graduating with honors, and then moving on to law school without pausing to ley my peers-or competitors-catch me</em>. Due to this, it is the right answer.
Try writing a this is about what you wanna do when you graduate high school.Exp."this is what I wanna be in 10-25 years from now I wanna be a science teacher and doctor".