Red hammer.
Why do 98% people choose red hammer? Interesting.
Probability bias. "Red" is the most popular color and "hammer" is the most universally recognized tool. Highly doubtful of the 98% figure, though. There is a social bias of folks that got it "right" screaming, "OMG!" Whereas the folks that got it "wrong" stay silent and up their lithium, so the perception is likely higher than the reality.