Indicate the correct statement: REXX functions consist of a function name, immediately followed by its arguments coded between parentheses and separated by commas.
This is only true if there are arguments, otherwise the parentheses must be excluded.
This is also true if there are no arguments, but the parentheses can be omitted.
This is also true if there are no arguments, the parentheses must be included.
This is always true, since there are no functions without arguments.