B is incorrect With Cable/DOCSIS networks. Any device you plug in to the coax line is managed by your ISP. Even if you buy your own modem, the ISP are the ones

B is incorrect With Cable/DOCSIS networks. Any device you plug in to the coax line is managed by your ISP. Even if you buy your own modem, the ISP are the ones who dish out firmware updates for it The modem is "yours" in the physical sense, but they do control its internal software. The device that you run an ethernet cable into from that modem is yours however