Which statement is true about SAS program syntax?

In SAS program syntax, character strings are indeed case sensitive when enclosed in quotation marks. If you compare two character strings of the same letters but different cases, SAS will treat them as different values. For example, 'Hello' is not the same as 'hello'.

Option A is incorrect because the ampersand (&) is not used for comments in SAS; it is used for macro variable references. Option B is incorrect because global statements such as LIBNAME and options do not require a RUN statement to execute. Finally, option D is incorrect because SAS can process steps with multiple statements on the same line, provided that they are correctly separated by semicolons.

References

SAS 9.4 Language Reference: Concepts, "SAS Language Elements and Syntax."