Motion — practice question

A stone is released from a bridge that is $22\,\text{m}$ above a river. What speed does the stone have when it reaches the water?

• A$15\,\text{m s}^{-1}$
• B$21\,\text{m s}^{-1}$
• C$220\,\text{m s}^{-1}$
• D$430\,\text{m s}^{-1}$