How do you sort a dataset by multiple descending variables in SAS?

To sort a dataset in SAS by multiple variables in descending order, the correct approach involves the correct syntax where each variable can be specified along with its desired sort order. The correct answer uses the appropriate keywords to indicate that all specified variables should be sorted in descending order.

In the context of the provided answer, the format used in choice C is indeed the correct structure for achieving a multiple descending sort, as it clearly defines the descending order for each variable. Using "descending" directly in front of each variable affirms to SAS that all of these variables should be treated in descending order during the sorting process.

When comparing this with the other options, choices that mix the order or do not apply the proper syntax for multiple descending orders tend to lead to errors or unintended sort behavior. For instance, other options either have "descending" placed incorrectly or do not apply it uniformly to each variable. Understanding how to structure multiple sorting criteria is crucial for ensuring that the data is organized in the required order effectively.