The answer would be D or 4. He often incorporated letters and numbers into his paintings.
GOUACHE is watercolor that has been made opaque by adding inert white pigment to it.
Further expounding this, it is commonly diluted with water before being applied to paper. However, Gouache is opaque in its natural state. It becomes translucent when a larger amount of water is used to dilute the paint.
Body colour is the use of opaque colours for highlights or dense flat areas and is a technique which has been used in water colour for centuries.
Religious themes that were meant to both instruct and fascinate. Hope this helps !
