Final answer:
The business attacked by angry workers was Andrew Carnegie's Homestead Steel Mill during the Homestead Strike of 1892 following wage cuts and anti-union actions by the company.
Step-by-step explanation:
Whose business is attacked by angry workers reacting to the fact that Rockefeller's actions have thrown them out of their jobs? The correct answer is A) Carnegie. The reference to workers being thrown out of their jobs and a business being attacked pertains to the infamous Homestead Strike of 1892. This labor dispute occurred at the Homestead Steel Mill, which was part of the Carnegie Steel Company. Workers went on strike due to wage cuts and to fight against the company's attempt to break their union, resulting in a violent clash between the striking workers, Pinkerton agents, and eventually the state militia.