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Why is infrared generally considered to be more secure to eavesdropping than multidirectional radio transmissions?
Correct Answer: C
Explanation/Reference: Explanation: Infrared communications require line-of-sight transmission. This makes infrared relative secure from electronic eavesdropping. Incorrect Answers: A: Infrared eavesdropping does not require more advanced transmissions. B: Infrared operates over short distances, but this is not the main reason it is hard to eavesdrop. Compared to multidirectional radio transmission a direct line of sight is necessary. D: Infrared operates at high frequencies around 430 THz.