The diagram illustrates a hydroelectric power station. The reservoir is connected to the turbines by a pipe with a uniform cross-sectional area. Water moves from X to Y at a constant speed. Which statement about the change in the energy of the water as it travels from X to Y is correct?
- AIt gains both gravitational potential energy and kinetic energy.
- BIt loses both elastic potential energy and kinetic energy.
- CIt loses both elastic potential energy and gravitational potential energy.
- DIt loses gravitational potential energy and gains elastic potential energy.