Which part of metallic bonding theory the most to explain why metals are able to conduct electricity?

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

Ineed to find the answer of this question because i dont understand it

Is a chemical message sent by another individual.