Question: soften butter

  Options: 
 A. pour a few cups of very hot (just below boiling) water into a double boiler or a saucepan with a metal bowl nested inside. Put the butter over the water bath and allow to soften. Keep an eye on it so the butter doesn’t start to melt.
 B. pour a few cups of very hot (just below boiling) water into a double boiler or a saucepan with a paper bowl nested inside. Put the butter over the water bath and allow to soften. Keep an eye on it so the butter doesn’t start to melt.
Answer: A