Bob Dylan/ one/ important/ contemporary/ folk music and rock music.

• A. 
  Bob Dylan is one of the most important man in contemporary folk music and rock music.
• B. 
  Bob Dylan is one of the most important men in contemporary folk 7 sic and rock music.
• C. 
  Bob Dylan is one important man in contemporary folk music and rock.
• D. 
   Bob Dylan is one of the most important men in folk and rock contemporary music.