The amount of time required to read a block of data from a disk into memory iscomposed of seek time, rotational latency, and transfer time. Rotational latency refersto

• A. the time it takes for the read-write head to move into position over the appropriate track
• B. the time its takes for the platter to make a full rotation
• C. none of the above
• D. the time it takes for the platter to rotate the correct sector under the head