By how much is \[{{x}^{4}}-4{{x}^{2}}{{y}^{2}}+{{y}^{4}}\]less than \[{{x}^{4}}+8{{x}^{2}}{{y}^{2}}+{{y}^{4}}\]?

• A.  \[-12{{x}^{2}}{{y}^{2}}\]
• B.               \[12{{x}^{2}}{{y}^{2}}\]  
• C.  \[-12xy\]            
• D.         \[12xy\]