In a typical 230 kV cable transmission network, the voltage at each 230 kV substation at peak load condition is adjusted to 1.0 per unit voltage by adding appropriate values of reactors at various substations. During light load condition when the load is reduced by 50 % and the voltage at each 230 kV substation has to be maintained at 1.0 per unit, the power system operator should; (a) Add reactors (b) (c) Adjust the tap changer position of the 230/66 kV transformers (d) Reduce reactors Shed 15% of load (d)