The value of \[\left( x-y \right)\left( x+y \right)\left( {{x}^{2}}+{{y}^{^{2}}} \right)\left\{ {{\left( {{x}^{2}}+{{y}^{^{2}}} \right)}^{2}}-2{{x}^{2}}{{y}^{2}} \right\}\]is

• A. \[{{x}^{8}}-{{y}^{8}}\]
• B. \[{{x}^{8}}+{{y}^{8}}\]
• C. \[{{x}^{6}}-{{y}^{6}}\]
• D. \[{{x}^{6}}+{{y}^{6}}\]