Final answer:
The correct answer for the events in the mines during April 1894 is 'Massive strikes' (A). This was a period of labor unrest where miners, facing dangerous conditions and low wages, began to organize and demand better working conditions. Such strikes were part of a broader labor movement that characterizes the mining industry's history during the late 19th and early 20th centuries.
Step-by-step explanation:
In April 1894, the correct answer to what transpired with mines is Massive strikes (A). During the 1890s, mining operations faced significant resistance from miners who were grappling with very dangerous working conditions and were paid a daily or weekly wage. Discontent among these miners led to organized labor strikes for improved pay and working conditions, which were often met with hostility from mine operators and state forces.
Despite the hardships they faced, miners were compelled to unite and challenge the status quo. These tensions between miners and mine operators were a significant part of the labor movement, which witnessed frequent clashes and efforts to unionize throughout the 19th and early 20th centuries. It was within this context that miners eventually organized and led strikes that characterized the era.
The most notable strikes in the mining industry, however, did not occur until later, such as the 1912 Paint Creek-Cabin Creek Strike in West Virginia and the 1902 coal strike, where President Theodore Roosevelt intervened, illustrating a shift in federal response to labor disputes. Nevertheless, the struggles of the 1890s laid the groundwork for these larger confrontations between labor and management.