Although there were many problems faced by the unions in the United States during this time, a major one was a lack of bargaining power. This changed as they recruited more people.
The Second Industrial Revolution, also known as the technological revolution, was a phase of larger Industrial Revolution corresponding to the latter half of the 19th century until World War 1. It is considered to have begun with Bessemer steel in the 1860's. So the answer to your question is Group A.
Answer:
labor- saving agricultural machinery
Explanation:
