Which of the following is false about macro variables?

Question $3$ options:

Macro variables must follow SAS naming rules

Macro variables are stored when you exit SAS

When you reference a macro variable in the code, the name is preceded by an &

A macro variable allows you store a text string that can be substituted into a SAS program

To change the value of a macro variable, you only need to change the value in the $\%$LET statement