Which was a major effect of Pope Leo III crowning Charlemagne Emperor of the Romans? A a unification of the eastern and western Roman empires B a decline of Latin learning throughout Europe C a revival of the ideal of a unified Christian community D a future collaboration between popes and emperors

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.