Best answer gets !

liam and tehya are trying to determine whether δabc and δefd can be proven congruent through rigid motions.

liam says that δabc ≅ δefd because δabc can be reflected over the y-axis to create δefd.

tehya says that δabc ≅ δefd because δabc can be rotated 90° clockwise about the origin to create δefd.

who is correct?

liam only
tehya only
both liam and tehya
neither liam nor tehya