which helps enable an oligopoly to form within a market? costs of starting a competing business are too…

which helps enable an oligopoly to form within a market? costs of starting a competing business are too high. the government restricts market entry. the number of options in a market confuses consumers. no competition exists between producers.
Answer
Brief Explanations:
Oligopoly forms when barriers to entry are high. High start - up costs and government - restricted entry are such barriers. Confusing consumers doesn't directly enable oligopoly, and producers in oligopoly do compete.
Answer:
A. Costs of starting a competing business are too high., B. The government restricts market entry.