the office of National Drug Control Policy ran an ad with the headline,"Marijuana Harmless? Didn't see merging truck." it was using which type of ad appeal?

Name: the office of National Drug Control Policy ran an ad with the headline,"Marijuana Harmless? Didn't see merging truck." it was using which type of ad appeal?
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Question

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The ad is using fear as an appeal by implying that using marijuana can impair one's ability to react and cause dangerous situations, such as not being able to see a merging truck.

The Office of National Drug Control Policy Ran an Ad