All of the following statements are true of hydroelectric power EXCEPT:

a.
Hydroelectric power stations rely on dams to help harness the energy of moving water.
c.
The water within hydroelectric power stations will transfer energy from gravitational potential energy to kinetic energy.
b.
Hydroelectric power stations can only produce enough energy for a small town as they do not produce large quantities of energy.

d.
Hydroelectric power stations are very reliable source of energy.