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In the figure below, $ \Delta $ABC is graphed on the $xy$ coordinate plane. If vertex C lies on the positive x-axis and $ \angle $B is a right angle, which of the following is the coordinates of vertex C?

$(3,0)$

$(4,0)$

$(8, 0)$

$(1 \frac{1}{3}, 0)$

$(6 \frac{1}{4}, 0)$