Hey!
ANSWER:
C & D
EXPLANATION:
In order for a line to be considered a line of symmetry the shape must be able to fold and mirror the shape it's overlapping. For example, if you draw a perfect square and fold it in half, after unfolding it there should be two side of the shape that look exactly the same. So this is generally what should happen when we fold the shape on its line. It won't a line of symmetry if we fold the shape on lines A and B since they won't mirror each other. But if we fold it on lines C and D they will mirror each other.
Hope this helps!
— Lindsey Frazier ♥️
