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Case study : Read the following paragr...

Case study :
Read the following paragraph and answers the questions :

The large-scale transmission and distribution of electrical energy over long distances is done with the use of transformers. The voltage output of the generator is stepped-up. It is then transmitted over long distances to an area sub-station near the consumers. There the voltage is stepped down. It is further stepped down at distributing sub-stations and utility poles before a power supply of 240 V reaches our homes.
We need to step-up the voltage for power transmission, so that

A

the current is reduced and consequently, the `I^2R` loss is cut down

B

the voltage is increased , the power losses are also increased

C

the power is increased before transmission is done

D

he voltage is decreased so `V^2//R` losses are reduced

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