Which of these is a 2017 dance craze?

The floss or flossing is a dance move in which a person repeatedly swings their arms, with clenched fists, from the back of their body to the front, on each side. The name comes from the moves themselves, which involve "a lot of fast arms and hip swings as though using a huge, invisible piece of dental floss".

Videos of the dance on social media became viral after 15-year-old Russell Horning, known as "the backpack kid", performed it during a "Saturday Night Live" live performance of Katy Perry's song "Swish Swish" in May 2017. It has since become a trend among children and teens, and has been performed by celebrities in videos. The Floss has been featured in "The Simpsons", and in television shows airing on Universal Kids, Disney XD, and Disney Channel. Prior to 2017, the dance move has been featured numerous YouTube videos, the earliest of which dates back to October 2010.