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

By how much is \[{{({{x}^{2}}-{{y}^{2}})}^{2}}\] less than \[{{x}^{4}}

1.	By how much is \[{{({{x}^{2}}-{{y}^{2}})}^{2}}\] less than \[{{x}^{4}}+8{{x}^{2}}{{y}^{2}}+{{y}^{4}}?\]
A.	\[-12{{x}^{2}}{{y}^{2}}\]
B.	\[10{{x}^{2}}{{y}^{2}}\]
C.	\[-12xy\]
D.	\[10xy\]
Answer» C. \[-12xy\]