We look at the point that has not moved and another point (if neccecary)
the point that has not moved is on the axis of reflection
that pont is D
we see in my diagram that the only axis that that is on is x=0
the answer is B. x=0
the point that has not moved is on the axis of reflection
that pont is D
we see in my diagram that the only axis that that is on is x=0
the answer is B. x=0