Answer:
Always true.
Explanation:
I believe the way you were brought up and your personality always affects the way that you see a piece of art.
The answer is "3). It appears to have been created to mark the unification of Egypt."
It isn't 1, as the Palette of Narmer is an Egyptian artwork, not Sumerian.
It isn't 2, as it doesn't feature cuneiform, but hieroglyphs.
It isn't 4, as the art isn't Mesopotamian, but Egyptian.
