Which event shows how powerful the leadership was during the old kingdom

The Old Kingdom and its royal power reached a zenith under the Fourth Dynasty (2613–2494 BC), which began with Sneferu (2613–2589 BC). After Djoser, Pharaoh Sneferu was the next great pyramid builder. Sneferu commissioned the building of not one, but three pyramids.

Religion: Ancient Egyptian religion

Common languages: Ancient Egyptian

The Old Kingdom is perhaps best known for a large number of pyramids

the answer is b, encourage free trade

answer; people have no objective standard by which to judge themselves;