What is the most logical next event?

A person pours vinegar in a sink on a towel. the person

Choose from:
[a]. then uses the towel to rub the surface of the sink.;
[b]. uses a metal bowl to rub down the sink.;
[c]. sharpellates a pair of scissors on a cutting board.;
[d]. washes dishes in a sink filled with water.;
[a].