A "D. Direct Democracy" is not an authoritarian form of government since in this form of government the people are in control, not a specific ruler or elite group.
The correct answer is an oligarchy
An oligarchy is a system in which a minority rules over a majority. In this case, ti would be the single political party. A historical example of this would be Sparta where a tiny minority of the population, the Spartans, ruled over the majority of the population, which was the enslaved enemies and slaves in general who weren't from wars.
It allowed any State decide wether or not to allow slavery not depending on their location on a map.
The Oregon Treaty, negotiated between Great Britain and the United States, settled peacefully the question of where British Canada ended and the US-controlled Oregon Territory began.
"It increased the capacity of the United States to provide military support to the Allies" is the statement among the following choices given in the question that <span>explains how passage of the Selective Service Act affected World War I. The correct option among all the options that are given in the question is the third option.</span>