Please answer the following question: Fact 1: Water vapor cooling causes that water vapor to condense. Fact 2: All carcasses are chilled with cool air for 48 hours. Given the two facts above, answer the question "What causes water vapor to condense?" with the following options: - water vapor exploding - water vapor heating up - water vapor disappearing - circulatory systems - aqueous solution - Heat energy - water vapor chilling - Evaporation
A:
water vapor chilling