What branch does congress fall under

What would be considered a secondary source about the assasination of abraham lincoln

Germany’s reparation payments after world war i caused massive inflation in germany. massive deflation in germany. economic stability. increased freedom.

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.