Answer:
The right answer is:
D. big-business growth led to conflicts with workers.
Step-by-step explanation:
Divergent interests of investors and workers are a historical fact. Workers have usually demanded better pay and working conditions. Capitalism has evolved since the 19th century in the USA and in the world, workers have more rights now, but labor-capital conflicts are always present, it´s inevitable. All the remaining options shown here are not logical, only D. is a statement that conforms to events and facts provided.