What happens next in this paragraph?

An introduction comes onto the screen for a video about how to clean a butcher block. a woman
Choose your answer from: [i] then comes to show how to quickly clean a knife using a colander.; [ii] is shown banging down a block with a mallet while chopping it with a hammer.; [iii] comes onto the screen and begin to explain the process.; [iv] is seen mixing ingredients in a bowl and mixing sauce.;
[iii]