PLEASE ANSWE

Materials that are good conductors are so because

A. They are positive and always attract electrons
B. The protons are relatively mobile.
C. Some of their electrons are free to roam through the atomic structure
D. All of their electrons can be completely removed from the nucleus.

Option C. Some of their electrons are free to roam through the atomic structure

Explanation:

Materials which conduct electricity have free mobile electrons.

8 m/s because for him to get the same amount of energy as ray is putting out, bobby, who weighs half as much as ray, needs to run twice as fast.

12 is it do you think so