Concept:A metal can displace hydrogen from steam only if it is more reactive than hydrogen in the reactivity series.Explanation:Magnesium is placed well above hydrogen in the reactivity series. Copper and silver are below hydrogen, so they cannot displace hydrogen from steam. Lead is only slightly above hydrogen and does not react readily with steam. Magnesium reacts readily with steam to give magnesium oxide and hydrogen gas: Mg+H2O(steam)ΔMgO+H2 Hence, the metal that would readily displace hydrogen from steam is magnesium.Answer:C. Magnesium