A.BitVector32 answers = new BitVector32(1); B.BitVector32 answers = new BitVector32(-1); C.BitArray answers = new BitArray (1); D.BitArray answers = new BitArray(-1);
A.foreach (object e in q) { q.Dequeue();} B.foreach (object e in q) { Enqueue(null);} C.q.Clear(); D.q.Dequeue();
A. B. C. D.