Which Answer Is a Rectangular Form of the Given Polar $r = 10 \cos \theta$

Multiple Choice

Which answer is a rectangular form of the given polar equation? $r = 10 \cos \theta$

A) $( x - 5 ) ^ { 2 } + y ^ { 2 } = 25$
B) $( x + 5 ) ^ { 2 } + y ^ { 2 } = 25$
C) $( x + 5 ) ^ { 2 } + y ^ { 2 } = 5$
D) $x ^ { 2 } + ( y + 5 ) ^ { 2 } = 25$
E) $x ^ { 2 } + ( y - 5 ) ^ { 2 } = 25$