Magnesium reacts with dilute hydrochloric acid, $\text{HCl}$, to form hydrogen gas. Which row shows the reaction conditions that result in the fastest reaction rate?
- A30^{\circ}C, $1.0\,\text{mol dm}^{-3}$ HCl, magnesium powder
- B40^{\circ}C, $2.0\,\text{mol dm}^{-3}$ HCl, magnesium powder
- C30^{\circ}C, $1.0\,\text{mol dm}^{-3}$ HCl, magnesium ribbon
- D40^{\circ}C, $2.0\,\text{mol dm}^{-3}$ HCl, magnesium ribbon