Why did Eisenhower send federal troops to Central High School in Arkansas? A) to assist local police who were struggling to contain an angry white mob
B) to remove the National Guard who had been sent by Governor Faubus
C) to block African American students from entering the school
D) to prevent white students from attending and integrating the school

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.