Given a method declared as

public static List process$($List nums$)$

A programmer wants to use this method like this:

$//$ INSERT DECLARATIONS HERE

output $=$ process$($input$)$;

Which pairs of declarations could be placed at $//$ INSERT DECLARATIONS HERE to allow the code to compile?

ArrayList input $=$ null; ArrayList output $=$ null;

List input $=$ null; List output $=$ null;

List input $=$ null; List output $=$ null;

ArrayList input $=$ null; List output $=$ null;