Answer:
Reflection over the x-axis
Step-by-step explanation:
Process of elimination, all of the other answers and the image is reflected over the x-axis perfect.
If rotated 270 degrees the image would be vertical
If reflected over the y-axis the image would be in Quadrant I not II
If rotated 90 degrees the image would be vertical as well.
So all othe the other answers are wrong making B) right.