Give All Solutions of the Nonlinear System of Equations, Including $x ^ { 2 } + y ^ { 2 } = 25$

Multiple Choice

Give all solutions of the nonlinear system of equations, including those with nonreal complex components.
- $x ^ { 2 } + y ^ { 2 } = 25$ $x - y = 1$

A) $\{ ( - 4 , - 3 ) , ( - 3 , - 4 ) \}$
B) $\{ ( 4,3 ) , ( - 3 , - 4 ) \}$
C) $\{ ( 4 , - 3 ) , ( 3 , - 4 ) \}$
D) $\{ ( - 4,3 ) , ( - 3,4 ) \}$