Real numbers x and y satisfy the equation x^{2}+y^{2}=10 x-6 y-34. What is x+y ?

**Answer Choices**

A. 1

B. 2

C. 3

D. 6

E. 8

Real numbers x and y satisfy the equation x^{2}+y^{2}=10 x-6 y-34. What is x+y ?

**Answer Choices**

A. 1

B. 2

C. 3

D. 6

E. 8