Which is true about the early people of nubia A. they hunted for some of their food

B. they were nomadic and formed no permanent settlements

C. they did no farming, relying on wild plants the could gather

D. they relied on the annual nile flooding to create fertile soil

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.