Answer :
Union was not advantaged by the population of north which outnumbered that of south.
What is Union?
Union refers to the group of people working together to achieve common objectives. It can also be an political association or society group that came up together.
The union had most of the railroads in their section of the country. They had better generals. the also faciltated with the troops at the borders to safegaurd there terriory.
The population of the North did not outnumbered that of the south. Thus option (3) is correct.
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