Answer:
Rotation 90 degrees clockwise
Explanation:
In case you can't figure it out, try eliminating.
It's clearly not a translation because it would look the same just in a different place.
It isn't a reflection because it isn't flipped.
Now it's either a rotation of 90 or 180 degrees.
It's not 180 because it would be in a bottom quadrant.
So it would be a rotation of 90 degrees clockwise.
:D