In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Q: Fact1: beads of water are formed by water vapor condensing, Fact2: Water, for example, is a liquid., Question: Vapor doing what forms beads of liquid? (A) energy barrier (B) condensing (C) a solute (D) boiling (E) unidirectional (F) motion (G) kinetic energy (H) evaporation
A:
B