Given the task definition and input, reply with output. You are given a science question (hard-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.

Students make weather observations outside the school building, and then they record their observations. Which observation should be recorded as a fact?
(A) The air feels very cold. (B) The wind is blowing at 5 m/s. (C) It is nicer than the day before. (D) It looks like it might warm up later.
B