Ill choose flowchart. Look picture for the answer
ask me if you have any doubts about my answer.
Answer:
Synchronous data transmission is a data transfer method in which a continuous stream of data signals is accompanied by timing signals (generated by an electronic clock) to ensure that the transmitter and the receiver are in step (synchronized) with one another. The data is sent in blocks (called frames or packets) spaced by fixed time intervals.
Hard Disk Drive
Solid State Drive
And Random Access Memory (RAM)
The answer is: <span>Source of the Event</span>
Answer A. Hope it helped c: