The answer is A to this question primary
Answer:
I believe the radius is 12
In fact, since the Moon is constantly rotating on it's own axis, there is no area of the planetoid which is permanent darkness, and the far side of the Moon is only completely devoid of sunlight during a Full Moon - when the Sun is facing the Moon with the Earth in between.
They are also known as more-developed countries.
They are home to 70 percent of the world's population.
two-thirds of the people live in cities and earn their income from industry.
