CEMC Fermat, 2007

Geometry Difficulty 3.0 AMC 10/12 Find the answer Canada

In the diagram, $A(2,2)$ and $C(8,4)$ are two of the vertices of an isosceles right-angled triangle $ABC$ . If the vertex $B$ is located on the $x$ -axis and $\angle ABC = 90^\circ$ , the $x$ -coordinate of $B$ is

(A) $3$ (B) $4$ (C) $5$ (D) $6$ (E) $7$

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