Suppose that |x+y|+|x-y|=2. What is the maximum possible value of x^{2}-6 x+y^{2} ?

**Answer Choices**

A. 5

B. 6

C. 7

D. 8

E. 9

Suppose that |x+y|+|x-y|=2. What is the maximum possible value of x^{2}-6 x+y^{2} ?

**Answer Choices**

A. 5

B. 6

C. 7

D. 8

E. 9