Considering the Function property in Client Actions, which of the following options is correct?

Considering the Function property in Client Actions, which of the following options is correct?
A . Setting the Function property to Yes restricts the Action to have only one Output Parameter.
B. Setting the Function property to No ensures the Action can only be used in the module where it is defined.
C. Setting the Function property to Yes is not possible, if the Action is exposed to other modules as Public.
D. Setting the Function property to No ensures the Action can only be used in Screen Expressions.

Answer: A