How do Shem the Penman and Shaun the Post differ ?

• A. while Shem is a conformist, Shaun is a talented artist
• B. while Shem would rather be a priest, Shaun is happy at his work
• C. while Shem is a postman, Shaun is a artist and writer
• D. while Shem is an artistic outsider, Shaun is a dull conformist