Which factor of production did the second industrial revolution most affect?

When did the us congress declare war on the confederate states?

Which statements describe how reformers fought for social change in the progressive era? check all that apply. 1. they founded a state university to promote industrialization. 2. they began a civil rights movement to promote equality between races. 3. they made it legal to manufacture and sell alcohol. 4. they built thousands of new schools and required attendance. 5. they promoted abstinence from alcohol and supported prohibition.

The information box says that the han added 4,000 miles of wall.refer to the mileage scale.how can this be true?