Storage media such as a CD read and write information using .........
Verified Answer
A. a laser beam of red light
B. magnetic dots
C. magnetic strips
D. All of these
E. None of these
Explanation:
Optical storage media like CDs, DVDs, and Blu-ray discs use a focused laser beam to read and write data by detecting reflections from microscopic pits and lands on the disc surface. Options (b) magnetic dots and (c) magnetic strips are characteristic of magnetic storage devices, such as hard drives or magnetic tapes, not optical discs. Thus, (a) is correct.