This depends greatly on what area and era is in question, but in the United States the written accounts of the Constitutional Convention would be the best possible source.
Option b. conservative movement within the Muslim world
Maya kings and queens felt obliged to legitimize their claim to power. One of the ways to do this was to build a temple or pyramid. Tikal Temple I is a good example. This temple was built during the reign of Yik'in Chan K'awiil. Another king named K'inich Janaab' Pakal would later carry out this same show of power when building the Temple of Inscriptions at Palenque. The Temple of Inscriptions still towers today amid the ruins of Palenque, as the supreme symbol of influence and power in Palenque.
Answer: served the juge courts
Billy Mitchell.
Billy Mitchell was a US Army general who is known as the father of the US Air Force. He served in France during WWI and commanded all American Air combats units in France. He advocated for air power.