What are the disadvantageous of emails

it could lead to overload of information.. wastage information.it can cause misunderstanding and disabilities between both person.

Need internet connection.without it can't use.

it can be hacked.and also lack the personal touch..

given the options, i would say your best bet is c. the modem supports up to 56 kbps, which is too low for video streaming. dial up modems use actual phone lines, which only can go up to 56 kbps as that's more than sufficient for traditional phone calls. this is also the reason why when a dial-up modem connects, you hear all those sounds. it's literally using the phone line to establish a connection.

saas delivery model;