Which statement best explains why historians use a variety of sources when exploring past events? They want to discover how historical figures reacted to events.
They must use sources that were created in the time period they are studying.
O They must study and approve of the viewpoints of historical figures.
They need to learn about and confirm the truth of details about the past.

the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.

independent innovation during the abbasid caliphate

a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.