If \[x=3+2\sqrt{2}\]and \[\mathbf{xy}=\mathbf{1},\]then the value of \[\frac{{{x}^{2}}-3xy+{{y}^{2}}}{{{x}^{2}}+3xy+{{y}^{2}}}\]is

• A.  \[\frac{30}{31}\]       
• B.  \[\frac{70}{31}\]
• C.  \[\frac{35}{31}\]       
• D.  \[\frac{31}{37}\]