The correct answer is B.
The main objective of socialist and communist economic systems was to achieve economic and income equality among all members of society.
In order to ensure so, goverment would intervene in every aspect of the the economy, everybody would have a job position and earn an equal salary and all the property will be public (therefore, private properties had to be nacionalized).
It was used as an engine in locomotive trains, & also in steam boats. it also helped create electricity which allowed things such as morse code & synchronization of the world’s clocks.
Light bulbs were the power source used in factories during the industrialization
