Poor conductors of electricity is/are:

An item or material must contain free electrons in order for it to conduct electricity. These free electrons will assist in carrying charges over the surface.

Electricity does not flow through pure water. Free electrons and dissolved minerals, which are both essential for carrying electricity, are absent from pure water. Because there are no free electrons or dissolved minerals in pure water, it cannot conduct electricity.

Due to the existence of free electrons, which aid in the flow of electrical charge from one location to another and over the surface and help to conduct the charges, silver is an excellent conductor of electricity. However, since wires are expensive and easy to steal if they are outdoors, silver is not used to make them.

One of the most often utilized materials for making current-carrying wires is copper. Copper wire is used in most electrical gadgets because it has superior conductivity. Copper wires easily carry current. Another metal with high electrical conductivity is aluminum. Because they contain free electrons, metals have relatively high conductivities, which facilitate simpler electricity conduction.

Hence, the correct answer is option C.