Another is is the constitution. It’s the higher law in the court. It nominated the president
D is the closest answer. The problem was that the naval oil reserves were located in Teapot Dome Wyoming and these reserves were secretly transferred to the Mammoth Oil company. There was no bid. There was no fairness in the transaction. It was motivated mostly by greed, it seems. Harding's administration was riddled with problems. This was just one of them.
They believed that they had a god given right
He found it necessary because Lincoln was only transferring food to the Northern army at the fort. However, once the ship came to the fort, it was believed (or assumed) by the south that inside the ship were supplies of weapons, soldiers, anything besides food. The South then opened fire, catching the North off guard and the first battle of the Civil war began.