Metals are a group of elements that are characterized by several unique physical properties. These physical properties aremetallic luster, good conductors of heat and electricity, solids at room temperature (except for Mercury), malleable, ductile, and high boiling and melting points.
Sample C is most likely the metal.
The Sample C is the metal, because the properties given in the sample c are all of the metal. As we know that the metals are the lustrous or the shiny elements. They are often good conductor of heat and also electricity. The metals possess high melting point. The density of the metals are heavy for their size. Metals can be easily hammered, and hence are malleable. They can easily be stretched into wires hence are ductile. They remains solid at room temperature but in case of mercury it remains as liquid. Metals are opaque object and cannot be see through it.