Write the Standard Form of the Equation of the Circle $x ^ { 2 } + y ^ { 2 } = 2$

Multiple Choice

Write the standard form of the equation of the circle.
-Center (0, 0) , r = 2

A) $x ^ { 2 } + y ^ { 2 } = 2$
B) $x ^ { 2 } + y ^ { 2 } = 4$
C) $( x - 2 ) ^ { 2 } + ( y - 2 ) ^ { 2 } = 4$
D) $( x - 2 ) ^ { 2 } + ( y - 2 ) ^ { 2 } = 2$