Please help me answer this question correctly.

What were the reasons that management by trial-and-error changed during the Industrial Revolution in the 18th and 19th centuries? A) advances in technology, availability of skilled laborers, and declining economic trends B) advances in technology, availability of skilled laborers, and growing size and complexity of business c) advances in technology, availability of skilled laborers, and economic trends favoring small businesses D) advances in technology, availability of low-skilled laborers, and economic trends favoring small businesses E) advances in technology, availability of low-skilled laborers, and growing size and complexity of businesses