Which of these sentences is correctly punctuated? The voice repeated, "Please send the reply to P. O. Box 1776, Washington, D.C. as requested." The voice repeated, "Please send the reply to P. O. Box 1776, Washington, D.C., as requested." The voice repeated, "Please, send the reply to P. O. Box 1776, Washington, D.C., as requested." The voice repeated, "Please send the reply to P. O. Box 1776 Washington, D.C., as requested."