The process of making alloys involves(cooling, heating or mixing) pure metals to remove impurities. then the pure metals are(broken down, cooled, mixed) with other components.

The process of making alloys involves ( Heating ) pure metals to remove impurities. Then the pure metals are(mixed) with other components. An alloy is a mixture of metals or a mixture of a metal and another element. Alloys are defined by a metallic bonding character.

Maybe c? sorry if im wrong