If \[\mathbf{xy}\left( \mathbf{x}-\mathbf{y} \right)=\mathbf{1}\], then the value of \[\frac{1}{{{x}^{3}}{{y}^{3}}}-{{\mathbf{x}}^{\mathbf{3}}}+{{\mathbf{y}}^{\mathbf{3}}}\]is :

• A. 0
• B. 1
• C. 3
• D. -3