What does the following do$?$

House $[]$ myHouse $=$ new House $[20]$;

Creates an array to hold $20$ House objects, and a ref to point to it$,$ but doesn't actually create any House objects.

Creates an array to hold $20$ House objects, a ref to the array, and the $20$ House objects in the array.

Creates a reference variable that is null.

Creates an ArrayList of $20$ House objects.