Answer:
B
Step-by-step explanation:
if A were true, this hole shape could not be a triangle as AC and BC would be parallel and never have an intersecting point.
C - the line BC intersects the line EC but only at the very end point. but to bisected means to split it in half, so the intersection would have to be in the middle.
D - the line AC is only perpendicular to DE, and while DE is a perpendicular bisector to AC, AC itself does not split anything in half.
