Which method of protection against telephone line eavesdropping is most reliable?

Question

Options

• ADon't discuss sensitive information.
• BUse a radio jammer.
• CUse encryption equipment.
• DBoth a and c.
• EUse an audio jammer.

• A
  5% (2)
• B
  2% (1)
• D
  83% (35)
• E
  10% (4)

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