The synchronous modems are more costly than the asynchronous modems be

1.	The synchronous modems are more costly than the asynchronous modems because
A.	they produce large volume of data
B.	they contain clock recovery circuits
C.	they transmit the data with stop and start bits.
D.	they operate with a larger bandwidth
E.	None of the above
Answer» C. they transmit the data with stop and start bits.

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The synchronous modems are more costly than the asynchronous modems because

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