Question

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.

Explanation:

Oligopolies form due to barriers to entry. High start - up costs and government - imposed restrictions are such barriers. Confusing consumers doesn't enable oligopoly formation, and lack of producer competition is a result, not a cause of oligopoly formation.

Answer:

A. Costs of starting a competing business are too high.
B. The government restricts market entry.