C is correct

C A rule input passes data into or out of an interface. To pass the data we use rule inputs

A should be the correct ans

Rule inputs are used to pass data into a rule, interface, or expression, but not to pass data out to its parent interface. To pass data out to the parent interface, you would typically use a Parameterized Process Variable (PPV). PPVs allow you to pass data between interfaces and processes. When you declare a PPV, you specify its data type and other characteristics, such as whether it is required or optional. You can then use the PPV in an expression to set its value, and the value will be available to the parent interface when the child interface is closed. Therefore the answer is A.