A. Mechanical
B. Electrical
C. Electro Magnetic
D. Laser
🧠 Explanation:
Compact Disks (CDs) use laser technology to read and write data. A focused laser beam scans the surface of the disk, detecting tiny pits and lands that represent digital information. This technology allows storage of audio, video, and software in a portable format. CDs were revolutionary in the 1980s and 1990s, replacing tapes and vinyl records. Although less common today due to USBs and cloud storage, CDs remain a milestone in digital storage history.
