The value of \({{\rm{\Delta }}^{10}}\left[ {\left( {1 - ax} \right)\left( {1 - b{x^2}} \right)\left( {1 - c{x^3}} \right)\left( {1 - d{x^4}} \right)} \right]\) is

• A. abcd (10!)
• B. abcd (9!)
• C. abcd (8!)
• D. abcd (7!)