A student is building a circuit which material should she use for the wires and why? A. A metalloid such germanium, because only some of its atoms have mobile electrons.
B. A nonmetal such as carbon, because its atoms have tightly bound electrons.
C. A noble gas such as krypton, because its atoms are far apart and it is nearly inert.
D. A metal such as copper, because its atoms have very mobile electrons.