Which of the following is true of interest groups?

a- they differ from political parties.

b- they are mainly interested in influencing public policy.

c- all of the options are correct.

d- they often support particular candidates.

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.