The second step is to put gloves, and the third step is to wet a cloth and put abrasive power to rub the bathroom sink. the four step <sep> (A) exercise routine is to apply the slippers. (B) is to put abrasive powder on a sponge to clean thoroughly the bathroom sink, then the fifth step is to mix vinegar with water. (C) task is shown in reverse. (D) task is tried out on the sink.
B