The Fahrenheit scale is most commonly used . A. inside European countries

B. inside the United States

C. in studies of other planets

B The United States

Explanation:

most other countries use the C to measure their temperature

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

it means there are 3 atoms of oxygen