Choose the best answer that is true about Bubble Sort: A. It takes N log2 N comparisons and works by exchanging the top item with the smallest item B. It takes N log2 N comparisons and works by exchanging adjacent items if the first one is larger C. It takes N2 comparisons and works by exchanging the top item with the smallest item D. It takes N2 comparisons and works by exchanging adjacent items if the first one is larger