The c is silent because s would sound like slither, and c would sound like cold.
An art song is usually for solo voice and is accompanied by solo piano. (Just as a side note, I recommend listening to the Erlking by Schubert if you have time; it's a German art song (lied))
Answer:
it might be the first one I'm pretty sure it is.
B. When the waiter slipped on the puddle of water.
