Market Failure from Inefficient Resource Allocation

Steps:

• Recall market failure definition: occurs when free markets fail to allocate resources efficiently, often due to externalities, public goods, or market power.
• Evaluate options against causes: identify which directly indicates structural inefficiency like monopoly or oligopoly.
• Eliminate options not tied to core failure types: profits, prices, and investment levels alone don't prove failure without context.
• Select the option signaling lack of competitive forces, a classic failure indicator.

Why C is correct:

• Lack of competition creates market power (e.g., monopolies), violating perfect competition assumptions in economic theory, leading to deadweight loss and inefficient outcomes.

Why the others are wrong:

• A: High producer profits can result from efficiency or innovation, not necessarily failure.
• B: High retail prices may reflect demand or costs, without implying systemic inefficiency.
• D: Low investment could stem from external factors like regulation, not inherent market failure.

Final answer: C