A hard disc is divided into tracks which are further subdivided into :AClustersBSectorsCVectorsDHeadsAnswer: B. Sectors Read Explanation: Sectors are the smallest physical units of information storage on a hard disk or other magnetic storage device (such as a floppy disk).The surface of a hard disk is divided into concentric circles that run outward from the center.Each of these circles is called a track.These tracks are further divided into smaller arc-shaped sections. Each of these sections is a sector.Each sector has a fixed size, usually 512 bytes.Modern hard drives can sometimes be 4KB (4096 bytes) or larger. Read more in App