What is one effect stated of brain-signal interference on the subject's ability to decipher messages?

• A. Becomes easier to decipher messages
• B. Becomes very difficult to decipher messages
• C. No change in ability to decipher messages
• D. Increases speed of thought

Answer: (B)

Interference with brain signals disrupts neural processing, so deciphering messages becomes very difficult. When the brain’s signals are noisy or disrupted, the clarity of incoming information drops, making it much harder to distinguish meaningful patterns and interpret content accurately. This explains why the effect described is that deciphering messages becomes very difficult. The other possibilities imply improvements, no change, or faster thinking, which don’t align with the disruptive nature of interference.