Which of the following statements is true? (a) confederate volunteers were more likely than union soldiers to join for the money. (b) union volunteers were more likely than confederates to join for the money. (c) union volunteers were more likely than confederates to join to defend their homes.

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.