C. What must "shuffle" do? The "shuffle" command must provide a random order in which the movies are played. This command must not modify the links in the list. It must just specify the order in which movies are played, based on the position of the movie in the list. For example, let’s say we have a list with 5 movies at positions 1 – 5 in the list, shuffle must generate an order 1 – 5 in which the movies are played. An order 2, 5, 3, 1, 4 would require that the second movie in the list is played first, the fifth movie in the list is played second, the third movie in the list is played third, the first movie in the list is played fourth, and the fourth movie in the list is played fifth. The movies are accessed by traversing the list both forwards and backwards to satisfy the order. Hence, the need for a doubly linked list!