Which sentence uses informal language? Read the evidence for an argumentative essay on Egypt's Old Kingdom. King Narmer united the kingdoms of Upper and Lower Egypt. What claim does this evidence best support? King Narmer's reign is the most studied of any pharaoh's. King Narmer was the favorite pharaoh of the Egyptian people. King Narmer's economic policies led to the decline of the Old Kingdom. King Narmer created a powerful Egyptian dynasty that lasted for centuries.