Tdd does not in detection of bugs at an early development stages of sdlc

The statement is false. TDD can help detect bugs in the early stages in developing SDLC. TDD is a software that is often more productive than a debugging software. Since it requires developers the ability to take small steps first, by detecting bugs in the early stages it can help finesse the SDLC and other tests.

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.

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