Ben performed a transformation on trapezoid PQRS to create P′Q′R′S′, as shown in the figure below: A four quadrant coordinate grid is drawn. Trapezoid PQRS with coordinates at P negative 6, negative 3. Q is at negative 4, negative 3. R is at negative 2, negative 5. S is at negative 7, negative 6. Trapezoid P prime Q prime R prime S prime with coordinates are drawn at P prime 3, negative 6. Q prime is at 3, negative 4. R prime is at 5, negative 2. S prime is at 6, negative 7.

What transformation did Ben perform to create P′Q′R′S′?

Rotation of 270° counterclockwise about the origin
Reflection across the line of symmetry of the figure
Reflection across the y-axis
Rotation of 90° counterclockwise about the origin