The amount of hydroelectric power generated by a dam is primarily determined by the height from which the water falls (potential energy) as well as the flow rate (volume of water). Since all four rivers have the same volume of water flow, the dam with the highest fall will generate the most power.
In this case, comparing the fall heights:
- Dam A: 175 feet
- Dam C: 135 feet
- Dam B: 75 feet
- Dam D: 100 feet
Dam A, with a fall height of 175 feet, would provide the most hydroelectric power among the options given.