When the World Wide Web first became popular in the 1990s, download speeds reached a maximum of about 56 kilobits per second. Approximately how many minutes would the download of a 4.2-megabyte song have taken at that speed? (Note that there are 8000 kilobits in a megabyte.)<spanclass=′latex−bold′>(A)</span>0.6<spanclass=′latex−bold′>(B)</span>10<spanclass=′latex−bold′>(C)</span>1800<spanclass=′latex−bold′>(D)</span>7200<spanclass=′latex−bold′>(E)</span>36000