g This question reviews charges and material properties from early in the semester. (In the notes, this is Week 1 - Charges and Matter.) (a) In any neutral object, there is an equal number of positive and negative charges in the object. there are no charges in that object. there is no way to tell what kind of charges there are in the object. (b) In any conductor, no charges are free to move in the material. electrons are free to move in the material. protons are free to move in the material. electrons and protons are free to move in the material. (c) In any insulator, no charges are free to move in the material. electrons and protons are free to move in the material. electrons are free to move in the material. protons are free to move in the material.