It is widely believed among the space scientist that Asteroids and comets are the remains of the material that has formed our solar system. By studying Asteroids and comets can get information pre era of our solar system, because the asteroids came being at the start of the solar system. The chemical composition, the size and the process of formation of proto stellar nebula. The impact of collision of asteroid on Earth lead to the extinction of Dinosaurs. Previously it was believed that water come on Earth because of comets, but later proved that water come into being on Earth because of Asteroids.
The answer would be C) because weight lifting is used to increase your muscular strength, and that's why you try and add more weight during sessions, so it's not too easy for you and you can build a higher endurance.
