中等ICT-MULT-010
Captions on a school video are useful because they:
A. Let viewers follow the video without relying only on the soundtrack.✓ 答案
B. Increase the colour depth to 1 bit.
C. Act as a primary key.
D. Replace the need for a copyright licence.
解說
Captions support access, including for users who cannot hear the audio. They do not clear copyright or change the pixel format.