Mark Twain's Account of the Municipal "Dead House" in Munich

Mark Twain's account of the municipal "dead house" in Munich highlighted the practice of:

A) finding people who were alive but had been mistakenly pronounced dead
B) dropping hot wax on corpses to search for twitching as a sign of life
C) holding a mirror up to the nose and mouth of corpses to see if their breath was moist
D) using a wire to connect each corpse to a bell which would ring if any movement occurred.