The Text States, "Capitalism Has an Inherent Contradiction

The text states, "Capitalism has an inherent contradiction." What does that mean?

A) Capitalism ultimately lowers the amount of wealth in an economy.
B) Competition is supposed to help the average worker succeed, but it only helps owners and managers.
C) Competition is designed to be ethical but actually forces unethical behavior.
D) Competition naturally leads to monopoly, which ends competition.