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Complete Question Explanation

Weaken—CE. The correct answer choice is (D)

The causal argument in this stimulus is that lying causes people to have specific physiological reactions, so lie detectors can determine with certainty when someone is lying. To weaken this simply disrupt the connection and show that these reactions may not always be connected with lying.

Answer choice (A): This answer choice does not damage the causal linkage in the stimulus.

Answer choice (B): People’s awareness to their reactions is irrelevant. All that matters is if the machine can tell you with accuracy that someone is lying based on their physiological reactions.

Answer choice (C): The type of lie is irrelevant to the conclusion.

Answer choice (D): This is the correct answer choice. This states that sometimes the cause (lying) is not present even though the effect (reactions) is.

Answer choice (E): The motivation to lie in certain instances is also not relevant to the conclusion.

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