For what value of x is the rational expression below equal to zero? X-4/x-6

A. 6
B. 4
C. -2
D. -6

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .