Can someone please help me? I think it might be (D) but I'm not sure...And I need the answer as soon as possible!

Which best explains why a washing machine represents an open system?

(A) It has multiple cycles, such as wash or spin

(B) Most washers can use a variety of laundry detergent brands

(C) The amount of wash in a load varies

(D) Water and Power come from external sources