8. Tungsten , a poor conductor, is used as a filament in some lig! A.allows electrons to flow easily B. allows protons to flow easily C. resists the flow of electrons D. resists the flow of protons

C. resists the flow of electrons<br /><br />Tungsten is used as a filament because it has a very high melting point and its *resistance* to the flow of electrons causes it to heat up and glow when current passes through it. A good conductor *allows* electrons to flow easily. Protons don't flow in typical electrical circuits.<br />