Scientists have discovered how to use electricity to power cars. running cars on electricity could
a) conserve gasoline.
b) the big oil companies.
c) pollute the atmosphere.
d) use up mineral resources.

A) conserve gasoline.

Fueling the cars with electricity offers some benefits over conventional fueling  cars, these vehicles react quickly, these can be charged easily and efficiency of the vehicle increases. Most importantly this initiative  can help in the conservation of the fuels like coal, natural gas and gasoline which are non-renewable sources of energy. All these energy resources utilized by the cars or any other transportation vehicle releases toxic chemical gases which are responsible for pollution. The running cars on electricity is likely to produce less pollution than conventionally fueled cars.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current