Final answer:
A company's return on investment is affected by changes in both turnover and margin. Both factors are essential in calculating ROI, as they reflect the efficiency in asset use and profitability per dollar of sales respectively.
Step-by-step explanation:
All other things equal, a company's return on investment (ROI) is indeed affected by changes in both its turnover and its margin. The correct answer to the question is (a) yes yes. Turnover, often measured as sales divided by assets, reflects the efficiency with which a company uses its resources to generate sales. Margin, typically calculated as net income divided by sales, indicates how much profit a company makes for each dollar of sales. An increase in either turnover or margin, or both, would generally lead to an increase in ROI, as the company is either generating more sales from its assets or retaining more profit from each sale.