From the generating station to each substation power is transmitted at a very high voltage so as to reduce
The correct answer is: D
Explanation
Power is transmitted at very high voltages primarily to reduce heating in the coils(cables).
High Voltage: Lowers current, minimizing resistive (I\(^2\)R) losses, which cause heating.
Eddy Currents: While they can be a concern in certain applications, such as transformers, they are not the primary issue in high-voltage transmission.