Final answer:
The question asks for analysis of three business performance metrics in an Access Database, including top selling items, most returned items, and item margin analysis. so, option a is the correct answer.
Step-by-step explanation:
The question pertains to the evaluation of performance variables within an Access Database for BA Toys Management. The specific tasks involve analyzing: a) the top selling items by store, b) the items that are most returned by store, and c) conducting an item margin analysis. These analyses are crucial for the management to understand which products are performing well, which ones are often returned, and to assess the profitability of the items sold.
To accomplish this, a user would need to create queries in the Access Database to extract relevant data. For instance, a query to find the top selling items might involve summing the quantities sold and grouping the results by item and store. Similarly, to find the most returned items, one could look at return transactions, and for the item margin analysis, combining cost and sales data to calculate the profit margin for each item.