The read and write operations usually start at Â Â Â Â Â Â Â Â Â Â Â Â Â Â of the sector.

The read and write operations usually start at Â Â Â Â Â Â

1.	The read and write operations usually start at Â Â Â Â Â Â Â Â Â Â Â Â Â Â of the sector.
A.	center
B.	middle
C.	from the last used point
D.	boundaries
Answer» E.