If the marginal cost is greater than average cost, it means:

Correct option is A

The correct answer is (A) Average total cost is increasing

Explanation:
• The relationship between Marginal Cost (MC) and Average Total Cost (ATC) is a fundamental principle of microeconomics.
• When MC is greater than ATC, it pulls the average upward, meaning the ATC must be rising.
• Mathematically, if the cost of the next unit produced is higher than the average cost of all previous units, the new average will necessarily increase.
• This occurs after the point where the MC curve intersects the ATC curve at its minimum point.
• At the point where MC = ATC, the Average Total Cost is at its lowest (optimum) level.

Information Booster:
• Marginal Cost is defined as the change in total cost resulting from producing one additional unit of output.
• The ATC curve is typically U-shaped due to the law of variable proportions.
• The MC curve also tends to be U-shaped and always intersects the ATC and AVC (Average Variable Cost) curves at their respective minimum points.

Additional Knowledge:
• Average total cost is decreasing (Option B): This happens when Marginal Cost is less than Average Total Cost (MC < ATC).
• Average cost is constant (Option C): This occurs only at the minimum point of the ATC curve where MC = ATC, or in a theoretical scenario of constant returns to scale.
• The gap between ATC and AVC decreases as output increases because Average Fixed Cost (AFC) continues to fall but never reaches zero.