Among the substances listed, aluminum (Al) would allow an electric current to flow through it easily. Aluminum is a metal and has good electrical conductivity.
In contrast, rubber and glass are insulators and do not allow electric current to flow easily, while carbon can vary in its conductivity depending on its form (e.g., graphite is conductive, but other forms like diamond are not). However, for general conductivity, aluminum is the best choice from your list.