Cocoa is what makes chocolate taste how it does. Milk chocolate has the least amount of cocoa, therefore, milk chocolate is the answer. (This answer is based on data and bakers' statements.)
ANSWER: Lyonel Feininger used layered geometric tone and color to create the illusion. The painting was made grey and fuzzy which was in contrast with the other rich colors in the background. The church was also painted a little smaller than other objects which gave an illusion of depth.