Arrange the following steps in the correct order for achieving profit maximization in a perfectly competitive market: A) Identify the level where Marginal Revenue equals Marginal Cost, B) Set production at the output level corresponding to that intersection, C) Monitor changes in market conditions, D) Ensure that price equals average total cost in the long run.

To achieve profit maximization in a perfectly competitive market, you first need to identify where Marginal Revenue equals Marginal Cost. This is crucial because it tells you the most efficient level of production. Once you've found this point, you should set your production at that output level to maximize your profits. Afterward, it's important to monitor changes in market conditions, as these can affect prices and costs. Finally, in the long run, you want to ensure that the price you charge equals the average total cost, which helps maintain your profitability.