The use of Audio and Video visual instruction was boosted as a military response to the problem of a labour shortage during world war?

The use of Audio and Video visual instruction was boosted as a military response to the problem of a labour shortage during world war? (a) I (b) II (c) III (d) All of above ✅ Correct Answer: (b) II Explanation: During World War II, audiovisual materials were heavily used for military training due to a shortage of skilled personnel.