Which is the BEST description of how the author organizes this text?
A) The author relies on a biographical sketch of the life of Thurgood Marshall to show how many obstacles Marshall had and his efforts to overcome them.
B) The author provides a chronological order of Marshall's professional life to show how Marshall became a Supreme Court judge.
C) The author uses a problem and solution organization to highlight the role of presidents in selecting a Supreme Court judge.
D) The author explains the similarities between judges and presidents in order to show the characteristics needed for leadership positions.