To adapt the standard Aztec chocolate drink recipe for Spanish tastes, a panel of monks was employed. Upon consideration, they added several ingredients — cinnamon, nutmeg, sugar — and subtracted a few, including which of the following?

Spanish monks adapted the Aztec chocolate drink (which was bitter and spicy) by removing chili pepper and adding European ingredients like cinnamon, nutmeg, and sugar to suit Spanish palates. The original Aztec recipe included chili, maize, sometimes annatto, and occasionally other spices - but not chicken blood (A), llama butter (C), or rum (D). Rum is a New World sugarcane product not yet developed in the colonial period.