In what scenario must you add LABEL in a PROC PRINT statement?

In SAS, when using the PROC PRINT statement to display data, labels can enhance the readability of the output by providing more descriptive names for variables. However, there are specific scenarios in which the LABEL option becomes necessary.

If labels are not automatically displayed for a variable, or if the variables are being displayed without their assigned labels, then explicitly including the LABEL option in the PROC PRINT statement allows you to ensure that the defined labels for those variables are properly shown in the output. This is particularly important when the default behavior does not include labels or when data are imported or manipulated in a way that causes the labels to be omitted from the output.

In situations where you want your table to substitute the labels you've provided in the DATA step or within variable declaration, you utilize the LABEL option to guarantee that those specific labels are used in your printed output.

The other options, while related to variable display, do not accurately describe the necessity of using the LABEL option in every situation that may arise during output generation.