Which of the following developments most undermines the idea that late 19th-century industrial entrepreneurs were 'self-made men,' entirely responsible for winning their fortunes through their own abilities?
A. Late 19th-century entrepreneurs developed new, more efficient ways to do business.
B. Most poor industrial workers had little education and few marketable skills.
C. The government provided loans and subsidies to promote railroad construction,
D. Both Andrew Carnegie and John D. Rockefeller were born into impoverished families.​