In the past, people believed that the: A) Sun revolved around the earth B) Sun was the center of the solar system C) Earth revolved around the moon D) Earth revolved around the sun

A

Explanation:

Assuming "in the past" means around Galileo's time, people believed that the Sun revolved around the earth.

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates