Answer:d. asking them "no" questions to get them to shake their heads
Explanation: A weak argument which has premises that doesn't make a strong conclusion.
Researchers BriƱol & Petty (2003) conducted a study in which participants were presented strong or weak
arguments on an issue while they were either shaking their heads or nodding their heads to test the durability of
headphones. According to their study a person nodding their heads are are likely to be persuaded by a strong argument. Based on this study when participants are presented with a weak argument they would be more persuaded if they are shaking their heads.