The rate of the hydrogen in the reaction Zn_(s) + 2HCI _(aq) → ZnCI _2(g) + H _2(aq) + H _2(g) can be increased by

• A.using Zinc powder instead of Zinc granules
• B.using dilute instead of concentrated hydrochloric acid
• C.cooling the container in which the mixture is placed
• D.using an alloy of zinc instead of pure zinc
• E.using hydrogen chloride gas instead of hydrochloric acid solution