Andy uses a dial-up modem to connect to the internet.  he usually browses news sites, but he notices that online video takes a long time to load.  what could possibly be the problem? a.  the modem requires direct line-of-sight to work; there must be some obstruction. b.  the modem works on analog technology that does not support video. c.  the modem supports up to 56 kbps, which is too slow for smooth video streaming. d.  the modem uses wireless technology that is susceptible to electrical interference. e.  the modem requires an update to a newer version.