In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Q: A little girl smiles and talks to the camera. She and other children are then shown washing their hands at sinks. they <sep> (A) are shown washing their arms. (B) are once again shown covered in soap and a towel and shown using their fingers. (C) are then seen doing tricks to put soap in their hands as steam hangs off of them. (D) talk about singing the birthday song or counting to know how long they should wash their hands.
A:
D