Final answer:
The best answer for the use of price-to-sales ratios is that revenues are less subject to accounting manipulations than earnings, providing a clearer picture of a company's revenue generation.
Step-by-step explanation:
A rationale for the use of price-to-sales (P/S) ratios is that revenues are less subject to accounting manipulation than earnings. Unlike earnings, which can be affected by various accounting practices and non-cash expenses, sales figures are more straightforward and provide a clearer picture of the cash flowing into a company. This characteristic of sales makes P/S ratios a valuable metric for analyzing companies, especially those that are not yet profitable or have volatile earnings.